在β-内酰胺环上含有6-甲氧基的药物是
A．青霉素B．阿莫西林C．氨苄西林D．替莫西林E．哌拉西林
参考答案：D
---Oh, how depressed! I’m bound to lose to him in tomorrow’s competition.
---Cheer up! In fact, he is _________ than you.
A．not more nervous
B．no more nervous
C．no less nervous
D．a little less nervous
证券交易所处于证券交易的中介地位，可以对可能形成的内幕交易行为进行审查把关。( )
