电缆耐压试验过程中，更换试验引线时，应先对设备（）。作业人员应戴好绝缘手套。
A.短路
B.充分放电
C.接地
D.验电
参考答案：B
根据上下文补全对话。
A: Where __1__ you go yesterday?
B: I __2__ to the aquarium with my classmates.
A: __3__ there any sea animals?
B: Yes, of course. There __4__ seals, dolphins, octopuses and so on.
A: That sounds interesting. Did you __5__ any photos?
B: Sure. What did you __6__ yesterday?
A: I __7__ a great time on our school trip. We __8__ the mountains and had a picnic there. Finally,
tired __9__ happy, we __10__ back to school.
对物流市场进行分析,主要包括需求市场分析,供应市场分析（）。
A．行业市场分析
B．技术市场分析
C．专业市场分析
D．产品市场分析
