若f(sinx)=3-cos2x,则f(cosx)=( )
A.3-cos2x
B.3-sin2x
C.3+cos2x
D.3+sin2x
答案:C
,
,,故选C.
— If you don’t like the red coat, take the blue one.
— OK, but do you have ______ size in blue? This one’s a bit tight for me.
A.a big
B.a bigger
C.the big
D.the bigger
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