Look at the picture. This is our school. There are five buildings in our school. There are thirty-two classrooms in the Teaching Building. Our gym is behind the Teaching Building. The teacher’s offices are in the Office Building. Our Library Building is next to the Office Building. There are many books and magazines (杂志) in the library. Is the Library Building next to the Science Lab Building? No, it’s in front of it. There are seven labs in it. Behind the Science Lab is the dining hall. In the dining hall there are many tables and chairs. We have meals (餐) there. Welcome to our school.

小题1:Our school has got __________ buildings.

A．2

B．3

C．5

D．8小题2:The gym is __________the Teaching Building.

A．behind

B．in the front of

C．in front of

D．next to小题3:The Library Building is __________ the Office Building.

A．next to

B．behind

C．on

D．in front of小题4:The Library Building is in front of __________.

A．the Teaching Building

B．the gym

C．the Science Lab Building

D．the Office Building小题5:The students have meals in __________.

A．the dining hall

B．the library

C．the science lab

D．the offices

如图所示，在铁圈和银圈的焊接处，用一根棉线将其悬在盛水的烧杯中，使之平衡；小心的向烧杯中央滴入CuSO4溶液，片刻后可观察到的现象是

A．铁圈和银圈左右摇摆不定

B．保持平衡状态

C．铁圈向下倾斜

D．银圈向下倾斜