G+球菌首选抗生素()。
A.头孢唑林
B.头孢曲松
C.妥布霉素
D.万古霉素
E.红霉素
参考答案:A
轴承分为( )两大类。
A.滑动轴承和向心球轴承
B.滚动轴承和滚针轴承
C.滑动轴承和滚动轴承
D.滚动轴承和向心球轴承
Speaker A: Hello, is that Steve I’m stuck in a traffic jam. I’m afraid I can’t make it before seven o’clock. Speaker B: ()。
A. OK, but I still hope you’ll try your best to arrive on time.
B. Yes. The traffic is very heavy because it’s the rush hour.
C. Why don’t you leave home a bit earlier
D. Never mind. I’ll be here waiting for you.