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问题 单项选择题

与化学位移现象或技术无关的是（）

A.MR波谱分析

B.化学位移伪影

C.分子环境不同产生共振频率差异

D.CHESS法获得纯脂肪图像

E.弥散加权像

答案

参考答案：E

选择题

—The rubbish is almost everywhere. Do you still want to have a picnic here?

—________. I hate to stay here. [ ]

A. Yes, of course

B. Yes, please

C. I'd love to

D. Of course not

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选择题

---Listen! Who ______ in the next room?

---I think Sam is.

A．sing

B．sings

C．singing

D．is singing
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