在主磁场中,氢原子核共振,需施加() A.相同带宽的表面线圈 B.相同幅度的梯度场

题型:单项选择题

问题:

在主磁场中,氢原子核共振,需施加()

A.相同带宽的表面线圈

B.相同幅度的梯度场

C.不同频率的射频脉冲

D.相同频率的射频脉冲

E.不同幅度的梯度场

考点:广西住院医师放射科综合复习放射科综合复习题库
题型:单项选择题

One day, a boy found the cocoon(茧) of a butterfly and brought it home. A few days later, the boy saw a small ___31___ in the cocoon. He sat and watched for several hours as a butterfly struggled to make ___32___ body through that little hole. Suddenly it stopped.
So the boy ___33___ to help the butterfly, thinking the butterfly might be___34___  .He took a pair of scissors(剪刀) and cut the hole ___35___  .The butterfly came out of the cocoon but it ___36___ a little different. It had a weak body and small, thin ___37___  .The butterfly didn’t start to fly. In fact, the butterfly spent the rest of its life crawling(爬行) around with a weak body and thin wings. It was never able to fly.
The boy acted with___38___  but he didn’t understand why it could be like this. When a butterfly crawls out of the cocoon, it must struggle. The hard work of ___39___  out of the cocoon makes the fluid(液体) from the butterfly’s body into its wings. It helps the butterfly be___40___ to fly. If the butterfly never has to squeeze(挤压) itself out of the cocoon, its wings will never get the fluid and it can never fly.___41___ struggles are what we need in our lives. If we lived our lives without any problems, we would never learn or grow. We would not be ___42___ as we could have been and we would never fly.
In our lives, pain and suffering is the key to all windows, and sometimes even ___43___ growth, without it , there’s no way of life. We can’t avoid ___44___  or problems. So, next time you are ___45___ a problem or difficulty, remember the butterfly. Struggle a little----then fly!
小题1:
A.hole B.worm C.tall D.snake
小题2:
A.it B.it’s C.itself D.its
小题3:
A.decided B.asked C.showed D.ordered
小题4:
A.afraid B.interestedC.surprised D.grateful
小题5:
A.slimmer B.bigger C.shorter D.smaller
小题6:
A.touched B.sounded C.looked D.smelt
小题7:
A.wings B.feet C.eyes D.head
小题8:
A.success B.excitement C.kindness D.humor
小题9:
A.get B.getting C.to get D.got
小题10:
A.ready B.quiet C.glad D.used
小题11:
A.SomewhereB.SomethingC.Some timeD.Sometimes
小题12:
A.as helpful B.as weak C.as strong D.as creative
小题13:
A.repeats B.recommends C.requires D.represents
小题14:
A.happiness B.difficulties C.pleasure D.hope
小题15:
A.served withB.growing intoC.bringing inD.faced with
题型:单项选择题

I took my driving license with me on holiday, _______ I wanted to hire a car.

A.incase

B.even if

C.ever since

D.so that

题型:单项选择题

什么是大型游乐设施?

题型:单项选择题

一种社会因素可引起多个器官或系统的健康效应指的是社会因素的()

A.广泛影响性

B.重叠性

C.积累性

D.恒常性

E.交互作用

题型:单项选择题

塑料模的合模导向装置主要有()导向和()定位,通常用()。

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