设3x=0.03y=10-2，则1x-1y的值为______．

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问题填空题

设3^x=0.03^y=10^-2，则

的值为______．

答案

根据题意，3^x=0.03^y=10^-2，

可得x=log_0.013，y=log_0.010.03，

则x-y=log_0.01100=-1

∴

的值为-1

故答案为-1．

句型转换

句型转换。

1. Li Lei said, "I come from Shanghai." (改为含有宾语从句的复合句)

Li Lei said that _______ from Shanghai.

2. Do you know? When does the train leave? (改为含有宾语从句的复合句)

Do you know_______?

3. One of the two boys must stay here. (改为同义句)

_______ the boys must stay here.

4. Both Lily and Lucy like dancing. (改为同义句)

_______ Lily _______ Lucy _______ dancing.

5. English names are not the same as Chinese names. (改为同义句)

English names are _______ Chinese names.

多项选择题

染色时间长短要随着染液的（）而决定。

A、质量

B、新旧

C、浓度

D、温度