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问题 选择题
有关①100ml0.1mol/LNaHCO3、②100ml0.1mol/L Na2CO3两种溶液的叙述不正确的是（   ）

A．溶液中水电离出的H+个数：②＞①

B．溶液中阴离子的物质的量浓度之和：②＞①

C．①溶液中：c（CO32-）＞c（H2CO3）

D．②溶液中：c（HCO3-）＞c（H2CO3）

答案

答案：C

选择题

如图所示，闭合开关，发现灯泡甲比灯泡乙亮．在该电路中，关于电流、电压、电阻和消耗的电功率大小的判断．正确的是（　　）

A．I甲=I乙

B．U甲＜U乙

C．R甲=R乙

D．P甲＜P乙
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填空题

用括号内所给单词的适当形式填空。

1. The _____ (clean) clean the roads early in the morning.

2. Tom was the _____ (five) runner past the finishing line.

3. You'd better _____ (not drink) too much water before you go to bed.

4. The old man looked at them _____ (angry) and couldn't say a word.

5. The panda has been _____ (die) for about two months.

6. In summer it _____ (rain) little in this city, so everyone must save water.

7. Look! The Greens _____ (get) ready for the journey.

8. So far, most of the children _____ (see) the film "Harry Potter".

9. There _____ (be) a talk on science in our school tomorrow afternoon.

10. I _____ (forget) the time for the meeting, so I was late.

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