beach复数

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• Mr Li with his two kids ( )to the beach for vacation beforeAgo Bgose Chas been Dhave gone
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• Many Chinese t(     ) came to Wunzhou to set up their companies.On (    ) sunny afternoon,my parents and I had a good time on the beach.    A.a    B.an     C.the  3.Half an hour later,the sun started to(   )   A.look up   B.come up   C.turn up
• 5.若复数cos2θ+isin2θ=1(θ∈R),则θ的一个可能取值为（）A.π/4 B.π/2 C.π D.3π/26.(1-√3i)/(√3+i)²=()A.1/4+√3/4i B.-1/4-√3/4i C.1/2+√3/2i D.-1/2-√3/2i9.设z1,z2是复数,且|z1|=|z2|=1,|z1+z2|=√3,则|z1-z2|的值为（）A.1 B.√2 C.√3/2 D.√2/2
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