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问题 单项选择题 A1/A2型题

鼻变态反应症状的发生主要与下列哪种细胞的激活有关（）。

A.杯状细胞

B.浆细胞

C.嗜酸性粒细胞

D.肥大细胞

E.中性粒细胞

答案

参考答案：D

解析：鼻变态反应症状的发生主要与肥大细胞的激活有关。

填空题

用适当的关系代词填空。

1. The man and his paintings ______ we heard of are famous.

2. In the dark street, there wasn't a single person to ______ she could tum for help.

3. Here is the girl ______ schoolbag has been stolen.

4. Mr Johnson said Shenzhen was the first city ______ he had visited in China.

5. The man ______ you talked to a moment ago is Mr. Smith.

6. The girl ______ leg was broken in the earthquake was taken to the hospital.

7. The old man ______ daughter died of SARS is in need of our help.

8. The man and the horse ______ fell into the river were dead.

9. His parents wouldn't let him marry anyone ______ family was poor.

10. Please pass me the book ______ cover is red.

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单项选择题

高层建筑、人员密集的公共建筑、人员密集的多层丙类厂房楼梯间的门为（），并向疏散方向开启；其他建筑封闭楼梯间的门可采用双向弹簧门。

A．甲级防火门 

B．乙级防火门 

C．丁级防火门 

D．戊级防火门
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