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问题 单项选择题

35岁女性患者，3年来反复在唇舌软腭出现1至数个溃疡，1周左右自愈，反复发作。应考虑诊断为()

A．疮疹性口炎

B．球菌性口炎

C．轻型口疮

D．疮疹样口疮

E．腺周口疮

答案

参考答案：C

改错题

单句改错（共10小题；每小题1分，满分10分）

下列每个句子中均有一处错误，请找出并改正。

小题1: Perhaps he would be able to earn their living after all.       改_____________

小题2:I am tired of eat the same food for lunch.                 改_____________

小题3: Great changes have been taken place in our hometown in the last ten years. 

改___­­__________

小题4: Even though her customers might get thin after eating Liu Ying’s food, but they were not eating enough energy-giving food to keep them fit.     改_____________

小题5: From then on, I grew rapid both in size and in brainpower.   改_____________

小题6: In the way our programmer is like our coach.              改_____________

小题7:Our fur is being used make sweaters for people like you.     改____________
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问答题 简答题

阀门在运行中产生振动和噪声的原因有哪些？
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