搜题请搜索小程序“爱下问搜题”
问题 单项选择题

某男童，体检时发现，口角湿白，口腔溃疡，鼻唇沟处脂溢性皮炎，自述怕光、流泪。该男童最可能为缺乏

A．维生素B1

B．维生素B2

C．维生素A

D．烟酸

E．维生素B12

答案

参考答案：B

听力题

根据括号中所给的汉语写出单词，使句子意思完整正确，并将答案填写在标号为46~50 的相应位置上。

小题1:The YOG volunteers go for a meeting every    (星期日) these months. They hope to help the visitors from different countries better.

小题2:The sunglasses that the boy    (戴) just now are broken. He will buy himself a new pair.

小题3:The    （人口）of the world is increasing quickly. The earth is becoming more and more crowded.

小题4:Don’t complain about the weather, it will be much    (雾) tomorrow.

小题5:You can’t imagine how    (困难) he has finished his work.
查看答案
选择题

当遇到巨大声响时，为保护鼓膜，应该

①迅速张口②迅速闭嘴③张口，同时双手堵耳④闭嘴，同时双手堵耳[ ]

A．①④      

B．①③    

C．②③    

D．②④
查看答案