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【简答题】
设函数f(x)= · ，其中向量 =（2cosx，1）， =（cosx， sin2x），x∈R。 （1） 若函数f(x)=1- ，且x∈ ，求x； （2）求函数y=f(x)的单调增区间；并在给出的坐标系中画出y=f(x)在区间 [0，π]上的图像.
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举一反三
【简答题】病原菌感染的途径有哪些?
【单选题】Goods with many close substitutes tend to have _________.
A.
price elasticities of demand that are unit elastic
B.
more elastic demands
C.
income elasticities of demand that are negative
D.
less elastic demands
【单选题】Many of the electric goods which are advertised as ______ the modern woman tend to have the opposite effect.
A.
liberate
B.
to liberate
C.
liberating
D.
liberated
【简答题】When should the goods have been delivered? The goods should have been delivered ______.
【单选题】Many of the electric goods which are advertised as ______ the modem woman tend to have the opposite effect.
A.
liberate
B.
to liberate
C.
liberating
D.
liberated
【单选题】Although they are twin brothers, they _____ in many respects. [ ]
A.
have much in common
B.
have little in common
C.
have a lot in common
D.
have a little in common
【单选题】Many goods have little or no form of packing and are carried __ .
A.
quickly
B.
bare
C.
faster
D.
loose
【单选题】Goods with many close substitutes tend to have
A.
more elastic demands.
B.
less elastic demands.
C.
price elasticities of demand that are unit elastic.
D.
income elasticities of demand that are negative.
【简答题】We have been an importer of
industrial goods for many years.
【简答题】改错：Many of the home electric goods which are advertised as liberating the modern women tend to have the opposite effectMany of the home electric goods which are advertised as liberating the modern wom...
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