Which of the following is proper for describing ice cream? 选项：

1. Which of the following is proper for describing ice cream? 选项： A、 There are no specific rules that define what can and can’t be labeled “ice cream”. B、 Usually there is only 5 percent milk fat in ice cream. C、 Not just any frozen treat can be called ice cream. D、 Any frozen treat can be called ice cream..

2.How Ice Cream WorksThe U.S. ice cream industry sells about a million gallons of ice cream 选项：How Ice Cream WorksB、The U.S. ice cream industry sells about a million gallons of ice cream each year, dispensing cones, gallons, pints, sundaes and other desserts through grocery stores and ice cream shops. In fact, eight percent of all the milk produced in the U.S. ends up in a frozen dairy product. C、Ice Cream or Frozen Dessert？ D、Not just any frozen treat can be called ice cream. In fact, the U.S. Department of Agriculture has specific tales that define what can and can't be labeled "ice cream". To bear the "Meets USDA Ingredient Standard for Ice Cream" stamp, it has to contain at least 10 percent milk fat, and a minimum of six percent non-fat milk solids. A gallon has to weigh at least 4.5 pounds. E、The range of milk fat (sometimes referred to as butter fat) used in ice cream can go from the minimum 10 percent to a maximum of about 16 percent. Most premium ice creams use 14 percent milk fat. Higher fat content leads to better, richer taste and a creamier texture. Ice cream makers don't go higher than 16 percent because it would be costly and very high in calories. An ice cream with this much milk fat would also taste so rich that people would probably eat it in smaller amounts, which would be bad news for people who sell ice cream for a living. F、Other frozen desserts, such as sorbets (果汁冰糕), low-fat ice cream, and frozen yogurt, are not technically ice cream at all. Frozen custard is ice cream that has at least 1.4 percent egg yolk solids, and "soft serve" can be any frozen milk-based dessert that has net gone through the hardening process--more on that later. G、In terms of specific ingredients, the recipe for ice cream is simple. But in scientific terms, it's complicated stuff, lee cream is a colloid, a type of emulsion(乳状液). An emulsion is a combination of two substances that don't normally mix together. Instead, one of the substances is dispersed throughout the other. In ice cream, molecules of fat are suspended in a water-sugar-ice structure along with air bubbles. The presence of air means that ice cream is also technically a foam. H、In addition to milk fat, non-fat milk solids, sugar, and air, ice cream also contains stabilizers and emulsifiers. Stabilizers help hold the air bubble structure together and give the ice cream a better texture. Although gelatin(凝胶) was originally used as a stabilizer, xanthan gum, guar gum, and other compounds are used today. Emulsifiers keep the ice cream smooth and aid the distribution of the fat molecules throughout the colloid. Egg yolks were once used, but ice cream manufacturers now tend to use other chemical compounds. These stabilizers and emulsifiers make up a very small proportion (less than one percent) of the ice cream. I、Making Ice Cream J、Whether it's being made in your kitchen with a hand crank, at a local homemade ice cream shop with a stand-alone ice cream maker, or in a factory that cranks out thousands of gallons of ice cream every day, the process of making ice cream is basically the same. The only difference is the scale of the operation. First, you need ice cream mix. You can buy commercially made ice cream mix that is set to a certain milk fat content, lee cream factories usually make their own mix by combining milk, cream and sugar in a 3,000 gallon vat with the proportions and mixing controlled by computers. The mix is then pasteurized (用巴氏法灭菌), Or heated, to kill any harmful bacteria. If you were to make your own mix at home, you could pasteurize it by cooking it in a double boiler, or use an egg substitute or pasteurized egg product. This step is important, because otherwise people who eat your homemade ice cream could get sick due to salmonella contamination. According to the Centers for Disease Control, those most at risk include the elderly, very young children, and people with compromised immune systems.L、The next step in production i A．YB．NC．NG

3.If Bobby decides that his marginal utility per dollar spent onvanilla ice cream exceeds his marginal utility per dollar spent onchocolate ice cream, he should then ( ) A: buy more chocolate ice cream and less vanilla ice cream. B: buy more vanilla ice cream and less chocolate ice cream. C: buy all the vanilla ice cream he can. D: never buy chocolate ice cream.

4.If Bobby decides that his marginal utility per dollar spent on
vanilla ice cream exceeds his marginal utility per dollar spent on
chocolate ice cream, he should then (
) 选项： A、buy more chocolate ice cream and less vanilla ice cream. B、buy more vanilla ice cream and less chocolate ice cream. C、buy all the vanilla ice cream he can. D、never buy chocolate ice cream.

5.Which of the following is the most specific?选项： A:Dessert.; B:Chocolate ice cream.; C:Chunky Monkey.; D:Ice cream.

6.Suppose that at Miles's current level of consumption, his marginal utility from a pizza is 10 utils, and his marginal utility from a pint of ice cream is 16 utils. If the price of a pizza is $8, and the price of a pint of ice cream is $5, is Miles maximizing his utility?选项： A:Yes. He should not change his spending on frozen pizza and ice cream.; B:No. He should shift his spending away from ice cream and towards frozen pizza.; C:No. He should shift his spending away from frozen pizza and towards ice cream.; D:No. He should buy less frozen pizza and less ice cream.

7.What does Harrison do first when testing ice cream 选项： A、He stirs the ice cream. B、He lets the ice cream warm up. C、He tastes the flavor of the ice cream. D、He examines the color of the ice cream.

8. Bobby consumes only chocolate ice cream and vanilla ice cream. He is spending all of his income. His marginal utility of chocolate is 100 and his marginal utility of vanilla is 200, and the price of chocolate is $1.00 per scoop and the price of vanilla is $2.00 per scoop. To maximize his utility, Bobby should 选项： A、 buy more chocolate ice cream and less vanilla ice cream. B、 buy more vanilla ice cream and less chocolate ice cream. C、 not change his purchases between chocolate ice cream and vanilla ice cream. D、 buy no chocolate ice cream.

9.Which of the following is likely to have the most price elastic demand?选项： A:ice cream; B:frozen yogurt; C:vanilla ice cream; D:HäagenDazs® vanilla bean ice cream

10.Which of the following foods can be called dessert? ( )选项： A:juice B:ice cream C:red wine D:butter cake

11.Americans nowadays prefer low-fat ice creams rather than rich taste ice cream. 选项： A:正确; B:错误

12.2. Which of the following is the most specific? 选项： A:Dessert ; B:Ice cream; C: Chunky Monkey; D:Chocolate ice cream

13.Suppose an economy only produces two goods, robots and ice cream. Last month, the economy produced 10 robots and 200 gallons of ice cream. This month, the same economy produced 15 robots and 240 gallons of ice cream. Which of the following statements could explain this change?选项： A:This month, the economy reduced the unemployment of its resources.; B:This month, the economy experienced an improvement in technology.; C:This month, the economy experienced an increase in resources; D:All of the above are correct.

14.Which of the following could account for the fact that ice cream prices have recently increased and that consumption of ice cream has declined? 选项： A: The supply of ice cream has decreased. B: The supply of ice cream has increased. C: The demand for ice cream has increased. D: The demand for ice cream has decreased.

15.The statement that "peach ice cream is better than chocolate ice cream" 选项： A、can be tested using the scientific approach. B、is a normative statement. C、is a positive statement. D、provides a basis for predicting which type of ice cream will exhibit the most sales.

16.In the third live course, Mr. Liu mentioned gelato, which is a sort of _____ ice cream.

17. Which of the following costs would be variable with respect to the number of ice cream cones sold at a Baskin & Robbins? 选项： A、 The cost of lighting the store. B、 The wages of the store manager. C、 The cost of ice cream. D、 The cost of napkins for customers.

18.What does Harrison do first when testing ice cream?A．He stirs the ice cream.B．He examines the colour of the ice cream.C．He tastes the flavor of the ice cream.D．He lets the ice cream warm up.

19.What does Harrison do first when testing ice cream?A.He stirs the ice cream.B.He examines the color of the ice cream.C.He tastes the flavor of the ice cream.D.He lets the ice cream warm up.

20.37) In the above figure, the individual's consumerplus will be highest ifA) the price of ice cream is $5 per gallonB) the price of ice cream is $3 per gallon.C) the price of ice cream is $2 per gallonD) ice cream is free

21.What is John Harrison' s job？A．An official.B．An ice-cream taster.C．A chemist.D．An ice-crea 选项：A、What is John Harrison' s job？ A．An official.B．An ice-cream taster.C．A chemist.D．An ice-cream manufacturer,