问题
多项选择题
测量小电阻时，主要应消除（）的影响。
A.连接导线的电阻
B.接头的接触电阻
C.短接
D.泄漏电流引起的电阻
答案
参考答案：A, B
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测量小电阻时，主要应消除（）的影响。
A.连接导线的电阻
B.接头的接触电阻
C.短接
D.泄漏电流引起的电阻
参考答案：A, B
I couldn’t believe my ears when I heard my name called for the leading role in our high school play. Mrs. Dermit, my drama(戏剧) teacher, had been looking for someone to play an energetic boy in a play. Luckily for me, she thought that I could act the 1 . That afternoon my friend Kevin and I talked 2 about the play. Although Kevin hadn’t been 3 for a role on the stage, his job with helping all the actors was important to the success of the play. I told him I was a little __4 because I had a lot of lines(台词)to memorize. “You can do it.” he said. I knew I could 5 on him: we had been friends since the third grade, and we made a good team. Preparations for the play moved at a rapid pace. While doing his own work, Kevin also spent hours helping me learn my lines. He often said my lines with me by silently moving his lips. We 6 that he could probably play my part as well as I could. Three days before the 7 night, everything was ready for the performance. But when I woke up with a high fever on the day of the play, the whole production came to a sudden __8 . Everyone in the drama department was worried, 9 there was no way I could perform. The play was 10 to open in fewer than six hours, and we had no time to cancel. I tried to think of a way to help. Then it hit me---Kevin knew the 11 as well as I did. I called Mrs. Dermit to give her my 12 . Within a few short hours, Kevin stood on the stage in costume(戏服) and makeup. The amusing lines he had 13 with me so many times made the crowd laugh and cheer. In a strange turn of events, Kevin and I had 14 the day for everyone by working as a team. Of course, I was terribly disappointed to have missed my chance in the spotlight, but I was extremely 15 to have such a good friend.
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