具有抗吞噬作用的细菌结构是（）（P441）A、细胞壁B、芽孢C、荚膜D、菌毛E、鞭毛

小题1: What is Mary’s problem?

A．Sh.e is so worried and can’t sleep.

B．She can’t pass the exam.

C．She can’t communicate with others.

D．She can’t study English well.小题2:Donna thinks Mary’s problem is __

A．great

B．common

C．wonderful

D．serious小题3: The word "reduce" in the passage probably means

A．减少

B．排除

C．加强

D．增加小题4: Donna thinks that           can help Mary think more clearly.

A．eating a lot of sugar

B．studying six hours every day

C．drinking a lot of coffee

D．eating foods high in Vitamin B小题5: Which of the following is TRUE according to Donna’s letter?

A．The best time to study is from 10 pm to 1 am.

B．Walking outside can make you remember more.

C．It’s good to tell a study partner about your feeling.

D．It’s necessary to have a rest for 15 to 20 minutes an hour.

比例尺为1：20000的地图上量得A、B两地距离是5cm，则实际距离是（　　）

A．500m

B．1000m

C．5000m

D．10000m

My sister wants a new dress. She    it to the party,

A．wears

B．has worn

C．wore

D．is going to wear

胶体微粒是许多（）和（）的集合体。

设计单位在设计文件中选用的建筑材料、建筑构配件和设备，应当注明什么？