中成药“双黄连注射液”的主要成分是()
A.大黄素
B.黄芩苷
C.芦丁
D.橙皮苷
E.红花苷
参考答案:D
Excuse _____ you, but I have an important message for you.
A.me to interrupt
B.for my being interrupted
C.my interrupting
D.me of interrupting
起重机电源刀开关闭合后,指示灯亮,但起重机不能起动,故障可能是熔断丝烧断。