题型：问答题 简答题 根据短文内容，用方框里所给词的适当形式填空。exciting, carry out, time, experiment, pick up, into, take One day, the great French scientist Andre Marie Ampere went on his way to give a lecture. He was thinking about an 1 as he was going along a river. He 2 a stone and put it into his pocket. Suddenly he thought out a way to 3 his experiment. He was so 4 that he threw what he thought was a "stone" in his pocket 5 the river. Later when he wanted to look at the 6 , he searched his pocket for the watch. But what he finally 7 out from his pocket was not a watch but thestone. 查看答案
题型：问答题 简答题 有一个基站电源是ZXDU500/200A，蓄电池容量是2组300AH，负载电流是50A，如果用油机来发电（整流器效率为0.85，油机效率为0.8，电池充电电流系数为0.1），那么合适的油机容量应该为（）。A、8.12KVAB、9.55KVAC、20KVAD、15KVA 查看答案