如图所示是各种不同电路器件的实物图片,属于用电器的是( )
A:电热驱蚊香
B:电池
C:空气开关
D:输电线
以下是实验室制取气体常用的化学仪器,请回答下列问题.
把正确答语前的字母填到横线上
①6How many birds do you see?____
②I'd like car 18,please.____
③What's this?____
④How many balls do you have?____
a. I have 11. b. OK c. My new crayons d. I see 15.