盼望多年的两岸三通终于实现，对此正确的认识有[ ] A、两岸和平统一，已成为两岸

读下面的对话，并作对话后面的选择题。

Waiter: May I help you?

Frank: Yes, please. I'd like some a hamburger and a glass of milk.

Waiter: Sorry. We don't have any. Our restaurant is a Chinese restaurant.

           We only have Chinese food. We have dumplings, rice, noodles, fish,

            and vegetables. Dumplings are delicious. Would you like some dumplings?

Frank: How much for one jin?

Waiter: Ten yuan.

Frank: OK. I'll have one jin.

Waiter: It's too much.

Frank: Then I'll have a half. What would you like, Jack?

Jack: I'd like rice and fish.

1. What do they have in the restaurant? They have _____.

A. donuts and hot dogs

B. hamburgers and French fries

C. rice and dumplings

D. milk and vegetables

2. Frank wants to eat _____.

A. a sandwich and a glass of milk

B. a hamburger and a glass of milk

C. noodles and dumplings

D. vegetables and rice

我国是手机使用人数最多的国家，手机之间通过　   　进行通讯；在真空中它的传播速度是　   　m/s．

黏菌（slime molds）

下列说法中正确的是（）

A.重力就是地球对物体的吸引力

B.两物体有弹力存在则物体一定发生了形变

C.两接触面间有摩擦力存在，则一定有弹力存在，且两者方向相互垂直

D.有规则形状的物体，其重心在物体的几何中心

外墙外保温工程大规模应用的保温隔热材料主要有（）

A.聚苯乙烯泡沫

B.挤塑聚苯乙烯泡沫

C.聚氨酯泡沫

D.发泡陶瓷保温板

E.舒乐板