三个互不相同的质数之积恰好等于它们和的23倍，求这三个质数为（_爱下问搜题

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问题填空题

三个互不相同的质数之积恰好等于它们和的23倍，求这三个质数为（）。

答案

3，13，23或5，7，23

单项选择题

隐匿性旁路是指（）。

A.QRS起始部无预激波

B.PR间期<0.12秒

C.房室旁路仅有前向传导功能

D.房室旁路仅有逆向传导功能

E.既可前向传导，又可逆向传导

填空题

从方框内选出正确的单词完成句子。

boring　relaxing　difficult　fun　interesting

1. John sits on the chair. It's very _____.
2. Sun can play volleyball. She thinks it's very _____.
3. I don't like maths. It's _____.
4. That book is very _____. I like it very much.
5. I can't play computer games. It's very _____.