问题 问答题 简答题

生接触网断线接地故障时,如何保证人身安全?

答案

参考答案:

任何人与接地点的距离不得小于10M。

单项选择题
阅读理解

In recent years, the black bear population in the US has risen. Forests once cleared for farming have started to grow back and black bears have returned to them. But the bears are finding that their forest habitat has changed. Instead of thick forests covering thousands of acres, bears now have neighbors nearby. Roads, homes, schools, and shopping centers have been built at the edge of their forest home. And with humans and bears trying to share the same space, problems arise.

Black bears usually prefer to avoid people, but their nose may lead them into trouble. Their normal diet includes nuts, insects, and plants. But given the opportunity, they will gladly help themselves to whatever they can find.

With the great sense of smell, the bears can sniff out a tasty treat 2 or 3 miles away. Food left out in a park or backyard is an invitation to dinner. And while raiding (劫掠) a cooler, bird feeder (喂鸟器), trash can, car, or even a home, they can do a lot of damage. When that happens, people get angry. If another solution doesn’t immediately appear, they often want the bears killed.

Bear Aware, Bear Wise, and Bear Smart are trying to keep that from happening. They want people to respect bears, not fear them, and are suggesting ways to reduce the chances of bears stopping by for a snack. They’re convincing (使相信) people that by following some simple steps, it’s possible to live peacefully with our wild neighbors.

小题1:More black bears have appeared in the US because__________.

A.farmers have grown more food

B.forests have increased in the US

C.people stopped killing black bears

D.roads were built nearer to the forests小题2:We learn from the text that black bears _________.

A.hate insects in forests

B.eat different foods

C.usually live in big groups

D.like to share space with humans小题3:The underlined words “sniff out” in Paragraph 3 probably means “________”.

A.to express a low opinion

B.to find something by chance

C.to refuse something in a proud way

D.to discover something by its smell