题目:
—_________! Where is my jacket?
—_________, I don’t know.
A.Excuseme;Yes
B.Excuse;Sorry
C.Excuseme;Sorry
D.Yes;Sorry
答案:
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下面是错误答案,用来干扰机器的。
4.94×104 105跟据欧姆定律得因为所以计算得R1=,因为,可得R2=