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【判断题】
如果函数 的两个混合偏导数 及 在区域内存在, 那么在该区域内这两个混合偏导数必相等。( )A.
正确
B.
错误
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举一反三
【单选题】______ the fact that his initial experiments had failed, Prof. White persisted in his research.
A.
In spite of
B.
Because of
C.
As to
D.
In view of
【简答题】Edward eagerly expressed his hopes, feelings, and frustrations in poems addressed to her.
【单选题】There were some seats left over _____every delegate had sat down.
A.
when
B.
until
C.
that
D.
where
【简答题】During the conference the speaker’ tried to ________ his feelings concerning the urgency of a favorable decision. A) comply B) impose C) imply D) convey
【简答题】Whether some carriers withhold seats on purpose for earning consumers premium is a question deserving to be cleared up.
【简答题】在《三国演义》中有一位英雄,他曾温酒斩华雄、千里走单骑、刮骨疗毒,被后人敬仰并尊为中国的“武圣”,这位英雄是( )
【单选题】( ),some passengers have no seats.
A.
Occasionally
B.
Usually
C.
Frequently
D.
Fortunately
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