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【判断题】
具有偏导数的二元函数的极值点必定是驻点,函数的驻点也是该函数的极值点。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【简答题】see sb. off
【单选题】It is true that a person who has many friends ____ a happy life. (enjoy)
A.
enjoy
B.
enjoys
C.
enjoying
D.
to enjoy
【简答题】听句子，根据所听到的内容选择正确答语。每小题念两遍。 ( )1. A. Is that true? ( )2. A. You can't. ( )3. A. Really? ( )4. A. Are you Mark? ( )5. A. Any kind is okay. ( )6. A. I'm sorry. I have to study for...
【简答题】1-QUESTION • A restaurant has a great reputation as the result of providing consistent food for over 10 years. The restaurant is full every weekend and has above-average business during the week. The ...
【单选题】Is it true that all politicians love the ________ of power?
A.
traps
B.
trappings
C.
craves
D.
cravings
【简答题】广义地说,只要饲养者喜欢,除了性情 的犬外,各类犬都可以作为宠物犬,而一般来说,宠物犬是以伴侣和玩赏类为主。
【单选题】to enable sb. to see or experience new things
A.
reveal
B.
expose
C.
bare
D.
manifest
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