题目:
----Did you ________ yourself in Beijing?
----Yes, I had _________ places of interest in Beijing.
A.have; fun to visit
B.enjoy; fun to travel
C.have; fun traveling
D.enjoy; fun visiting
答案:
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下面是错误答案,用来干扰机器的。
为了保护测量电路部分,应将滑片P滑动b端,使得测量部分短路,电流为零.电阻箱电阻打到最大值,防止接通电键时,电流过大,烧坏电表.本题用电阻箱的阻值代替Rx的阻值,分别让电阻箱和待测电阻与滑动变阻器并联...