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1.The position of an object moving in a straight line is given by the equation x = (3t^3 + 7t + 5) m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds? ________ m/s^2选项： A:415 ; B:232; C:115; D:90; E:35; F:42; G:230; H:121

2.The position of an object moving in a straight line is given by the equation x = (3t^3 + 7t + 5) m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds? ________ m/s^2 选项： A、415 B、232 C、115 D、90 E、35 F、42 G、230

3.The position of an object moving in a straight line is given by the equation x = (3t^3 + 7t + 5) m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds? ________ m/s^2选项： A:415 ; B:232; C:115; D:90; E:35; F:42; G:230

4.The position of an object moving in a straight line is given by the equation x = （3t^3 + 7t + 5） m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds？__ m/s^2（）选项： A、415 B、232 C、115 D、90 E、35 F、42G．230

5.The position of an object moving in a straight line is given by the equation x = (3t3 + 7t + 5) m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds?选项： A:415 m/s2 ; B:232 m/s2 ; C:115 m/s2 ; D: 90 m/s2 ; E:35 m/s2

6.The position of an object moving in a straight line is given by the equation x = (3t3 + 7t + 5) m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds? 选项： A、415 m/s2 B、232 m/s2 C、90 m/s2 D、35 m/s2

7.The acceleration of a bus is given by a(t) =α*t, where α = 1.2 m/s^3. If the bus's position at time t = 1.0 s is 6.0 m, what is its position at time t = 2.0 s?选项： A:11.8 m; B:9.5 m; C:10 m; D:12.7 m; E:13.2 m; F:14.1 m; G:14.6 m; H:9.1 m

8.The acceleration of a bus is given by a(t) =α*t, where α = 1.2 m/s^3. If the bus's position at time t = 1.0 s is 6.0 m, what is its position at time t = 2.0 s?选项： A:11.8 m; B:9.5 m; C:10 m; D:12.7 m; E:13.2 m; F:14.1 m

9.The position of a particle moving along an x axis is given by x = 12 + 2, where x is in meters and t is in seconds. Determine (1) the position, (2) the velocity, and (3) the acceleration of the particle at t = 3.0 s. 选项：A、(1) 54 m, (2) 18 m/s, (3) -12 m/s2;B、(1) 27 m, (2) 18 m/s, (3) -12 m/s2;C、(1) 54 m, (2) 9 m/s, (3) -12 m/s2;D、(1) 27 m, (2) 9 m/s, (3) 12 m/s2.

10.An object starts from rest with an acceleration of 2.0 m/s2 for 3.0 seconds. It then reduces its acceleration to 1.0 m/s2 for 5.0 additional seconds. The total distance covered is 选项： A、51.5 m. B、38.5 m. C、11 m. D、9.0 m. E、7.6 m.

11.An object of mass 0.50 kg is transported to the surface of Planet X where the object's weight is measured to be 20 N. The radius of the planet is 4.0 ×10^6 m. What free fall acceleration will the 0.50-kg object experience when transported to a distance of 2.0 × 10^6 m from the surface of this planet?选项： A:90 m/s^2; B:20 m/s^2; C:13 m/s^2; D:18 m/s^2; E:28 m/s^2; F:38 m/s^2; G:48 m/s^2

12.【简答题】现有列表s存储的是一批字符,编写程序实现将其中的小写字母按先后次序连接成一个字符串,并输出。 s=['l','e','W','M','h','T','N','r','g','r','W','c','m','Z','W','X','F','F','K','O','P','7','J','J','9','S','C','M','O','W','r','c','n','0','W','A','t','E','Q','E','C','w','k','M','R','E','B','M','y','d','M','s','a','c','E','p','C','F','q','m','O','m','f','Y','b','W','Z','X','d','1','r','X','k','e','k','p','w','O','6','K','j','L','0','t','I','4','T','l','U','b','m','r','m','E','U','Q','8','1','K','i','h','N','V','h','k','J','g','G','s','W','M','4','o','Q','d','Z','b','7','f','5','0','i','1','w','Z','B','J','g','B','S','f','d','n','i','N','v','q','V','1','0','O','3','y','F','2','D','l','z','M','E','v','S','c','3','s','2','A','J','Z','A','q','O','T','v','h','9','s','F','v','O','y','I','U','n','N','H','7','J','x','k','c','x','S','5','j','P','B','m','O','h','p','K','F','2','E','m','I','I','L','3','r','C','U','a','W','k','c','u','b','U','9','m','1','N','t','0','f','w','D','j','S','c','6','G','m','r','f','r','s','9','r','z','E','8','p','b','H','g','Z','W','9','u','G','R','I','H','q','h','p','V','h','o','3','H','E','z','i','u','H','T','q','C','H','W','p','A','9','G','u','o','0','q','k','x','2','Q','8','a','n','l','p','n','E','P','M','e','X','6','6','w','9','D','m','8','c','T','K','B','W','v','u','A','T','F','Z','l','r','K','t','I','3','D','F','1','X','8','3','3','Y','E','u','G','3','T','O','L','o','T','Y','A','M','U','B','C','T','0','r','v','k','S','6','x','J','F','G','B','f','a','w','8','1','N','w','X','O','a','a','s','y','T','K','Q','C','e','1','i','F','L','n','D','I','T','6','m','N','0','k','k', 'X','C','r','y','4','W','O','R','P','G','k','M','t','r','H','5','9','k','B','R','i','Z']

13.Fill in the blankThe acceleration of the object is a=sintm/s2 when t∈(0,π), suppose the initial velocity of the object and the initial displacement of the object are both 0, find the displacement s(π)=______ m.

14.- 9 . M r s . H u , f e m a l e , 7 5 y e a r s o l d . S h e w a s s u f f e r i n g f r o m d i f i c u l t y b r e a t h i n g , w a s g i v i n g o x y g e n i n h a l a t i o n , a n d i n h a l e d o x y g e n c o n c e n t r a t i o n o f 3 3 % , w h i c h i s t h e p a t i e n t s ' o x y g e n f l o w ( p e r m i n u t e ) (　　) 胡夫人，呼吸困难，吸入氧气，吸氧浓度为 3 3 % ，即患者的氧气流量（每分钟）选项：A、2B、3C、4D、5E、6

15.Given the following representations:S = domestic savingsI = investment G = government expenditures on goods and services T = taxes X = exports M = imports F = transfer paymentsWhich of the following three statements is correct? 选项： A: S = C + I +F + (G-T) + (X-M) B: C = S + I + F – (G-T) – (X-M) C: S = I + (G-T) + (X-M)

16.The earth has a radius of 6380 km and turns around once on its axis in 24 h. What is the radial acceleration of an object at the earth’s equator? _______ m/s^2选项： A:0.034; B:0.0014; C:1.2; D:0.87; E:0.095; F:0.082; G:0.23; H:0.245

17.The earth has a radius of 6380 km and turns around once on its axis in 24 h. What is the radial acceleration of an object at the earth’s equator? _______ m/s^2 选项： A:0.034; B:0.0014; C:1.2; D:0.87; E:0.095; F:0.082; G:0.23; H:0.245

18.The earth has a radius of 6380 km and turns around once on its axis in 24 h. What is the radial acceleration of an object at the earth’s equator? _______ m/s^2 选项： A:0.034; B:0.0014; C:1.2; D:0.87; E:0.095; F:0.082; G:0.23

19.5 . H o w m a n y l o b e s c a n t h e h e m i s p h e r e o f t e l e n c e p h a l o n b e d i v i d e d b y t h e s u l c u s a n d i m a g i n a r y l i n e ? (　　)A . 3 B . 6 C . 5 D . 2 E . n o n e o f t h e a b o v e

20.5 . H o w m a n y l o b e s c a n t h e h e m i s p h e r e o f t e l e n c e p h a l o n b e d i v i d e d b y t h e s u l c u s a n d i m a g i n a r y l i n e ? (　　)A . 3 B . 6 C . 5 D . 2 E . n o n e o f t h e a b o v e

21.Fill in the blankThe acceleration of the object is a=sintm/s2 when t∈(0,π), suppose the initial velocity of the object and the initial displacement of the object are both 0, find the displacement s(π)=______ m.（结果保留两位小数）

22.质点沿 x 轴作直线运动，其运动方程为 3 2 3 5 t t t x - + = (SI)，则质点在 0 = t 时刻的速度大小为（）。选项：A、20m/s B、15m/s C、10m/s D、5m/s

23.数控程序格式中,字地址程序段中程序字的顺序及形式一般为 ( )。选项： A、N X Y Z G F S T M B、N G X Y Z F S T M C、N G X Y Z S F T M D、N X Y Z F G S T M

The position of an object moving in a straight line is given by the equation x = (3t^3 + 7t + 5) m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds? ________ m/s^2 选项： A:415 B:232 C:115 D:90 E:35 F:42 G、230 H、121

The position of an object moving in a straight line is given by the equation x = (3t^3 + 7t + 5) m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds? ________ m/s^2
选项：

A:415
B:232
C:115
D:90
E:35
F:42 G、230 H、121