如图电路中，当S₁闭合、S₂断开时，电压表的示数为2.5V；当S₁断开、S₂闭合时，电压表示数为6V，则灯L₁两端电压为____V，灯L₂两端的电压为____V，电源电压为____V．

用括号内所给动词的适当形式填空。
The garden is the best place ____ (grow) flowers.
This pair of jeans ____  (match) his white shirt.
Listen! How wonderful the music____ (sound) ！
 Mary, ____  (not be) afraid of the dog. It never bites.
 Keep quiet, the students ____ (prepare) for the coming exam.
____  (ride) a bike to school is good for your health.
Sandy spends a lot of time____  (chat) with her e-friend on the Internet.
How long does it take you____ (walk) to school every day?
I don’t have any ideas, I don’t know where ____ (go).
Would you like____ (drink) a cup of tea?

判断对错

一个数个位上的数是3，6，9，这个数一定能被3整除．