地球上最冷的地区在[ ] A、北极地区 B、南极地区 C、蒙古、西伯利亚 D、青

题型:选择题

问题:

地球上最冷的地区在[ ]

A、北极地区

B、南极地区

C、蒙古、西伯利亚

D、青藏高原

考点:极地地区
题型:选择题
在匀强磁场中有一个原来静止的碳14原子核,它放射出的粒子与反冲核的径迹是两个相内切的圆,如图所示.那么碳14的衰变方程为(  )

A.+

B.+

C.+

D.+

题型:选择题

Directions: Complete the following passage by using ONE word that best fits the context.

An American soldier called his parents from San Francisco after a war. “Mom and Dad, I’m coming

home, but I’ve got a favor to ask. I have a friend I’d like to bring    48   me.”

“Sure,” they replied. “We’d love to meet him.”

“There’s something you should know,” the son continued. “He was hurt pretty    49   in the fighting. He stepped on a land mine   50   lost an arm and a leg. He has nowhere else to go, and I want him to come and live with us.”

“I’m sorry to hear that, son. Maybe we can help him find   51   to live.”

“No, Mom and Dad, I want him to live with us.”

“Son,” said the father, “Someone like him would be a terrible burden on us. Just come home and forget about this guy. He will find a way to live on his    52  .”

At that point, the son hung up the    53  .

A few days later, the parents received a call from the San Francisco police. Their son had died after falling from a building,     54   the police believed was suicide. They went and recognized him, but    55  their horror, they also discovered something they didn’t expect: their son had only one arm and one leg.

题型:选择题

电子商务的出现和发展彻底改变了供应粮上原有的物流、信息流、资金流的焦化方式和实现手段()

题型:选择题

简述在开车过程中,各塔底备泵如何切换?

题型:选择题

换流站安全生产的目标是什么?如何对安全生产目标进行管理?

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