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问题 填空题

如果方程x2-4x+2=0的两个实数根分别是x1、x2，那么x1x2=______．

答案

∵方程x2-4x+2=0的两个实数根分别是x1、x2，

∴x1x2=

c
a
=2．

故答案是2．

选择题

If your partner is weak in study, you ______ to help him. [ ]

A. suppose

B. will suppose

C. are supposed

D. will be impolite

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选择题

There is _____ in today's CCTV news. [ ]

A. important something

B. important nothing

C. something important

D. anything important

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