9，18，27，( ) A．81 B．26 C．45 D．54

利用图示连接装置，进行氢气还原氧化铜的实验，并测定铜的相对原子质量（已知H，O的相对原子质量）．

试回答：

（1）仪器装置的连接顺序（填写接口代码数字）：______接______接______接______接______．

（2）装置I，Ⅱ的作用分别是______，______．

（3）加热CuO之前必须进行的操作是______．

动词填空， 用括号内所给动词的适当形式填空。

1. Xiao Li promised to chat with me on the Internet, but so far he __________ (not do) so.

2. At the moment we have too much to do __________ (think) of doing anything else.

3. Last Friday afternoon the young man __________ (hurt) in the traffic accident which happened

   on the highway.

4. Sound __________ (travel) through air at a speed of about 340 metres per second.

5. Food cannot __________ (keep) properly in a fridge at an unsuitable temperature.

6. The snow __________ (stop) when she woke up and the sun was shining brightly.

7. Every one of us was excited, for in a few minutes we __________ (see) Liu Xiang appear on the

    sports ground.

8. The Women's World Cup __________ (not begin) until 1991 when China hosted it in Guangzhou.

9. Understanding yourself is very important to __________ (build) self-confidence.

10. On Earth, gravity keeps our feet on the ground and makes anything we drop __________ (fall) towards

     the ground.

在需求曲线图上，需求曲线是一条( )倾斜的曲线。

A．自左上方向左下方
B．自左上方向右下方
C．自右上方向右下方
D．自右上方向左下方

（），著名作家郁达夫由浙江进入安徽，写下《出昱岭关记》、《屯溪夜泊记》、《游白岳齐云山记》。

A.1932年2月

B.1934年3月

C.1933年4月