彩色多普勒或频谱多普勒检查时，出现混叠（aliasing）后应采取什

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问题多项选择题

彩色多普勒或频谱多普勒检查时，出现混叠（aliasing）后应采取什么措施尽量消除之（）。

A.增大增益

B.调整PRF

C.调整STC

D.减小增益

E.调整频谱或彩标的基线

答案

参考答案：B, E

阅读理解

任务型阅读，根据短文内容，回答下列问题。

It's eight o'clock in the evening. The family are all at home. Jerry's father is sitting in a sofa. He's

watching TV. His mother is standing near the window. She's giving some food to the bird Polly. Polly

says, "Thanks! Thanks!" Where's Jerry? Oh, he's behind the door. Kate is looking for him. They are

playing games. There isn't any homework on Saturday evening.

1. Are Jerry's parents in the park?

_____________________________________________________

2. What's the time now?

_____________________________________________________

3. What are Kate and Jerry doing now?

_____________________________________________________

判断题

柜员收付单笔现金人民币十万元或外币折美元1万元（含）以上的应换人卡把复点。