All present were shocked by what the lit

询价小组由由（）人以上的单数组成。

A.3

B.5

C.7

D.9

下列化合物中毒性最强的萜类生物碱是( )

A．乌头原碱

B．乌头次碱

C．乌头碱

D．去甲乌药碱

E．去甲萨苏林碱

按要求改写下列各句，每空一词。

1. She has lunch at twelve. (对划线部分提问)

   _____ _____ does she have lunch?

2. What time is it now? (改为同义句)

   _____ the _____ now?

3. Jack eats breakfast at home. (改为一般疑问句)

   _____ Jack _____ breakfast at home?

4. Scoot works very long hours every day. (改为否定句)

   Scoot _____ _____ very long hours every day.

5. Thanks for your letter. (改为同义句)

   _____ _____ for your letter.

平面为圆形或多边形，上为锥形，没有正脊的屋顶样式为( )。

A．庑殿顶
B．攒尖顶
C．卷棚顶
D．硬山顶

根据供水对象的重要性进行工程等别划分，对特别重要的供水对象，工程属于（）等工程。

A.Ⅰ

B.Ⅱ

C.Ⅲ

D.Ⅳ