It’s the first time I __ to see you this year.
A.had come
B.came
C.have come
D.come
答案:C
值班室电钳工每天必须对漏电继电器的运行情况进行检查和跳闸试验。()
具有清热解毒,凉血消斑的药物是()
A.败酱草
B.金银花
C.鱼腥草
D.鸦胆子
E.大青叶