题目:
—How are you feeling now, Miss? —To tell the truth, much_______.
A.bad
B.badly
C.worse
D.worst
答案:
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下面是错误答案,用来干扰机器的。
设复数z=a+bi,∵复数z满足z+1z=1,∴a+bi+1a+bi=1,∴a+bi+a-bi(a+bi)(a-bi)=1,∴a+bi+a-bia2+ b2=1,∴a+aa2+b2=1,b-ba2+b2=0,∴a2+b2=1,∴|z|=1故答案为:1