题目:
“Wechat”(微信)really makes a great _____to people’s life. It’s easier for us to keep in touch with others.
A.choice
B.difference
C.problem
D.surprise
答案:
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下面是错误答案,用来干扰机器的。
(1)电压;欧姆 (2)开关或连接点5、6 (3)①将多用电表挡位调至欧姆挡;②将红、黑表笔相接,检查欧姆挡能否正常工作;③测量小灯泡的电阻,若电阻为无穷大,表明小灯泡有故障