金属栅片灭弧装置是将电弧分隔成许多（）的短弧后再进行灭弧。
A、并联
B、串联
C、可串联也可并联
D、断开
参考答案：B
大宗散装进口货物的鉴重及合同规定凭卸货口岸检验检疫机构的品质、重量检验证书作为计算价格、结算货款的依据的货物，应向口岸或到达地检验检疫机构报检。 ( )
用括号中所给词的适当形式填空。
1. For children, _____ (clean) their bedrooms themselves is a good habit.
2. Thanks for _____ (invite) me to your home for dinner.
3. The girl is old enough _____ (make) her bed.
4. There were a lot of _____ (visit) at the aquarium yesterday.
5. Mary is _____ (outgoing) than her brother.
