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【判断题】
大气热力学分层中,对流运动最强的层次是对流层。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Which of the following can be inferred from paragraph 4 about the third zone?
A.
It is the most expensive area in which to live.
B.
It does not have factories and businesses.
C.
People who live there travel long distances to work.
D.
Most of the residents there work and live in the same zone.
【简答题】Questions 18～21 are based on the following dialogue in a travel agency. Which city is the man going to visit? [A] Oxford. [B] Paris. [C] Shaftsbury. [D] London.
【简答题】泌尿男性生殖器结核原发灶多在 （ ）。
【单选题】A certain water delivery pipeline uses an IS50-32-200 centrifugal pump to send the water in the low-level open trough to the open trough which is 3 m higher than the low-level open trough. After the v...
A.
Series connection
B.
Parallel connection
C.
A and B
【单选题】Which of the following is the place of greatest altitude on a mountain?
A.
The foot of the mountain.
B.
8,500 feet up the mountain.
C.
The top of the mountain.
D.
15,785 feet up the mountain.
【单选题】A rock is thrown off a 30 m cliff at a 45° angle above the horizontal. Which is the following is true regarding the acceleration of the rock? (air resistance is negligible)
A.
The acceleration will be of magnitude g and have both horizontal and vertical components.
B.
At the peak of the rock’s path, the magnitude of acceleration will be half of what it was when the rock was initially thrown.
C.
The acceleration will be of magnitude g and in a downward direction.
D.
The acceleration will be downward during the rock’s ascent and upward during the rock’s descent.
E.
The acceleration will increase throughout the rock’s flight .
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