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【简答题】
In practice, this is an advantage to the plane, which is already at a good height when it reaches the polar region and so does not need to climb, while at the same time cold air keeps the clouds down low.
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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】When a disease of epidemic proportions rips into the populace, scientists immediately get to work, trying to locate the source of the affliction and find ways to combat it. Oftentimes, success is achi...
A.
dispose of it naturally.
B.
combat against it readily.
C.
attend to it reluctantly.
D.
split it up properly.
【单选题】SECTION A CONVERSATIONS In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. Questions 1 to 3 are based on the follow...
A.
The outlook.
B.
The personality.
C.
The minor details.
D.
The lightening.