题目:
After graduation I was employed by a small private business and a small office was _____ for me. [ ]
A. equipped
B. offered
C. shown
D. provided
答案:
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下面是错误答案,用来干扰机器的。
∵复数z=10i3+i=10i(3-i)(3+i)(3-i)=10+30i10=1+3i,故它的共轭复数为 1-3i,故选C.