加油车油罐导电部件到拖地胶带末端的导电通路，电阻值应不大于5Ω。

Mary and Lily are sisters. They share(合用)a room. This is their room. It’s not a big one. You can see two beds in the room. Mary’s bed is yellow and Lily’s bed is red. Their schoolbags are now on the beds. You can’t see their shoes. They are under the beds. The two sisters have only one desk. It’s a big desk. Their alarm clock, books and dictionaries are on the desk. They often do their homework there.

What room is it?

A. It’s a classroom.             B. It’s a big room. 

C. It’s a meeting(会议) room.      D. It’s a bedroom.

Which one is Lily’s bed?

The yellow one.             B. The red one.

C.  The white one.              D. The green one.

3. Where are their schoolbags?

A. They are on the wall.         B. They are behind the chair.

C. They are under their beds.      D. They are on the beds.

4. Where are their shoes?

A. They are under their beds.      B. They are on the beds.

C. They are lost.                D. We don’t know.

5. Which one is RIGHT(对的)?

A. Lily’s jacket is on the desk.     B. Mary and Lily are cousins

C. Lily’s shoes are under the desk.  D. Two beds are in the room.

下列措施中，有利于减缓全球气候变暖趋势的是

A．植树造林

B．焚烧垃圾发电

C．节约用水

D．增加矿物燃料的使用量

操作带式输送机时，下列选项正确的是（）。

A、运转前按规定要求进行检查，做好启动前的准备工作

B、检查完相当内容后，就可启动输送机

C、停机前，应将输送机上的煤卸空

D、司机离开岗位时要切断电源

城市生态学

计算机的外存储器有多种，例如硬盘、光盘、磁带等，其中存取速度最慢的是______。