We don't allow（）in the meeting room.
A. to smoke
B. smoked
C. smoking
D. to smoking
The first paragraph mainly tells us______.
A. why we don't feel air
B. why atmosphere is important to us
C. why there is air surrounding us
D. why there is air pressure
Mr White was interested in all because______.
A. he hadn't been in Australia before
B. he had never left his hometown before
C. he had to be a traveler
D. he hoped to live in the country
某病人长期咳嗽，咳痰每日量约300ml，如咳痰不畅时则呈弛张型发热，此时血象的变化最可能是( )。
A. 嗜酸性粒细胞增加
B. 中性粒细胞增加
C. 大单核细胞增加
D. 淋巴细胞增加
E. 红细胞减少
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