室外变压器最大过负荷值不得超过额定容量的().
A、30%
B、20%
C、15%
B、10%
参考答案:A
肺癌发病年龄多在
A.35岁以上
B.40岁以上
C.45岁以上
D.50岁以上
E.55岁以上
It was years later that I was able to fully understand what role stamp collecting ______ in your life. [ ]
A. found
B. played
C. kept
D. provided