搜题请搜索小程序“爱下问搜题”
问题 单项选择题

麻疹患儿具有传染性的时间是（）

A.发病前1天至出疹后1天

B.出疹前5天至出疹后5天

C.出疹～出疹后3天

D.发热～出疹后5天

E.发热～出疹后7天

答案

参考答案：B

阅读理解

阅读对话，回答问题。

A: Excuse me, who's that man, Xiaohua?    

B: He's my father.

A: Is that woman your mother?            

B: No, she isn't. She's my aunt, Miss Liu.

A: Where's your Mum?                  

B: Look! She's in the car.

A: Oh,I see.   

1. Where's Xiaohua's Mum?

                                                    

2. Who's that man?

                                                    

3. Is Miss Liu Xiaohua's Mum?

                                                    
查看答案
单项选择题

HYZ4正压氧气呼吸器的适应温度为（）。

A.0℃～40℃

B.－10℃～40℃

C.10℃～40℃

D.10℃～60℃
查看答案