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【判断题】
到某一游览点后，若有个别旅游者希望不按规定的路线而希望自己游览或摄影，若环境许可，可满足其要求。 （ ）A.
正确
B.
错误
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【单选题】If a 1 kg mass is dropped to the floor from a height of 5 m, what is the approximate velocity once it reaches the ground?
A.
10 m/s
B.
5 m/s
C.
1 m/s
D.
100 m/s
【单选题】Particle 1 of mass m 1 = 6.0kg, particle 2 and 3 of mass m 2 = m 3 = 4.0kg, and distance a = 2.0cm. What is the net gravitational force (its magnitude and direction) on particle 1 due to the other par...
A.
F 1,net = 5.1x10 -6 N, θ = 104 o
B.
F 1,net = 4.1x10 -6 N, θ = 104 o
C.
F 1,net = 4.1x10 -6 N, θ = 204 o
【单选题】配制2％盐酸普鲁卡因滴眼剂1000ml，为使其等渗，需加氯化钠的量是(已知1％盐酸普鲁卡因溶液的冰点降低为0．115，1％氯化钠溶液的冰点降低为0．58)
A.
3．59
B.
4．69
C.
5．09
D.
8．19
E.
9．39
【单选题】What does Dr. Fred Whipple mean when he says this?
A.
Halley's Comet is a mass of ice covered with dust.
B.
Halley's Comet is filled with dust.
C.
Halley's Comet is a mixture of ice and dust.
D.
The structure of comet is equal to that of any other stars.
【简答题】生产餐饮产品的原料大多是鲜货原料，极容易（）。
【单选题】配制1000ml2%盐酸普鲁卡因溶液，需要加入多少克氯化钠使其成等渗（1%盐酸普鲁卡因的冰点降低值为0.12℃）
A.
4.5
B.
4.8
C.
0.45
D.
0.48
E.
48
【单选题】配制2%盐酸普鲁卡因溶液1000ml,需加( )g氯化钠使成等渗溶液(1%盐酸普鲁卡因的冰点降低值为0.12°C)
A.
8.4
B.
4.8
C.
6.5
D.
2.4
【单选题】According to Dr. Mass, the Cornel psychologist, which of the following is NOT correct?
A.
People should take napping as a daily activity.
B.
Naps strengthen the ability to pay close attention to details.
C.
We should sleep for eight hours during the night.
D.
It's much helpful to nap for twenty minutes during the day than to sleep twenty minutes more than usual during the night.
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