下图剖面图最能反映我国地势特征的是（ ） A． B． C． D．

设有如下声明： Dim X As Integer 如果Sgn(X)的值为-1，则x的值是( )。

A．整数

B．大于0的整数

C．等于0的整数

D．小于0的数

—Would you have told him the answer had it been possible?

—I would have, but I ______so busy then.

A．had been

B．were

C．was

D．would be

__________, the song is very popular. 

A．Sounded beautifully

B．Sounding beautifully

C．Sounded beautiful

D．Sounding beautiful

下列事件发生的先后顺序是

①穆罕默德兵临麦加城下②穆罕默德病逝③穆罕默德出走麦地那④穆罕默德出家隐修[ ]

A．④③①②

B．④③②①

C．③①②④

D．①②③④

“见肝之病，当先实脾”属于

A．未病先防

B．既病防变

C．治病求本

D．因人制宜

E．扶正祛邪