河姆渡居民的生活产品主要来自于[ ]
A.采集
B.狩猎
C.农耕
D.畜牧
答案:C
根据括号内所给单词的适当形式填空。
小题1: (lucky), I finished my work on time.
小题2:Are there any _______ _ (sheep) on your uncle’s farm?
小题3:I can hear the children (sing) in the classroom.
小题4:We went (camp) in a small village in India.
小题5:– What did you do last Sunday ?
– I ________ (study) English at home.
在测量电压时,万用表如何与被测线路或电器设备相连接?