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问题 单项选择题

用直探头以水为透声楔块使钢板对接焊缝中得到横波检测，此时探头声束轴线相对于探测面的倾角范围为：（）

A、14.7°~27.7°

B、62.3°~75.3°

C、27.2°~56.7°

D、不受限制

答案

参考答案：B

填空题

Dear Amy,

I have a problem and I’m writing ask you 1. （）

for an advice. This is a secret, so l don’t tell anybody else. 2. （）

My cousin and I used to getting along very well and 3. （）

we were good friend. We were planning to spend 4. （）

part of the winter holiday together, but now 5.（）

I don’t think I want to invite her home. 6. （）

Recently I has discovered that he’s started to tell 7. （）

lies. When I told him this was wrong to tell lies, 8. （）

but he just laughed at me. The problem is, should I 9. （）

tell his parents or his teacher, or should I keep quietly. 10. （）

第（9）空应（）
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单项选择题

以下符合短暂性脑缺血发作影像学改变的是（）

A.CT低密度灶

B.CT高密度灶

C.MRITI低信号

D.MRIT2高信号

E.MRI弥散加权成像高信号
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