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【简答题】
（本小题满分12分） 已知函数 ， （1）若 ，求 的值；（2）若 为偶函数，求 。 （3）证明：函数 在区 间 上是增函数。
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反馈参考答案：
举一反三
【简答题】What can be used to separate cargo in a hold?
【单选题】David is so curious that no one can ________ from finding out what is going on.
A.
hold him back
B.
hold him up
C.
hold to him
D.
hold him down
【单选题】You can stow poisonous and flammable goods in one hold
A.
Poisonous goods can be stowed away from flammable goods by one hold
B.
Poisonous goods shall not be stowed in the same hold with flammable goods
C.
Poisonous goods and flammable goods can be stowed in one hold
D.
Poisonous goods and flammable goods cannot be stowed in one hold
【单选题】A(n) ____ folder is similar to a drop box; it can hold files and folders that you want to share with other people on your network.
A.
Offline
B.
Online
C.
Private
D.
Public
【单选题】The production can be ______ for several months by the strike.
A.
hold in
B.
hold up
C.
hold on
D.
hold with
【单选题】Folders can hold other folders called ____.
A.
mini-folders
B.
subfolders
C.
objects
D.
tiered-folders
【单选题】Don’t worry. We can stay here as long as our supplies .
A.
hold up
B.
hold out
C.
hold on
D.
hold back
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