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【简答题】
（本小题满分12分）设定义域都为 的两个函数 的解析式分别为 ， （1）求函数 的值域； （2）求函数 的值域．
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举一反三
【单选题】Daniel has ________ CDs than Amy, but ________ DVDs than Paul. [ ]
A.
more; less
B.
more; fewer
C.
less; more
D.
fewer; less
【单选题】Which of the following assumptions about vocabulary is NOT true?
A.
A vocabulary item can be more than one word.
B.
Both teachers and students need to know that there is a difference between active and passive vocabulary.
C.
Words can be taught and learned most effectively in groups of words that are related to each other.
D.
The best way to explain vocabulary is to translate .
【单选题】What does the author compare grammar and vocabulary to?
A.
He compares grammar to a well-conditioned car and vocabulary to a road map.
B.
He compares grammar to a tall tree and vocabulary to beautiful flowers.
C.
He compares grammar to a road map and vocabulary to a well-conditioned car .
D.
He compares grammar to beautiful flowers and vocabulary to a tall tree.
【简答题】What poses the biggest threat to the data stored on CDs and DVDs?
【简答题】In the ______ Method, vocabulary selection procedures are followed to ensure that an essential general service vocabulary is covered.
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