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【多选题】
我国公布分12种主要污染物控制指标中,属于大气污染物指标有( )A.
烟尘
B.
粉尘
C.
二氧化硫
D.
氮氧化物
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举一反三
【单选题】I hope that I shall never again have to _______ such a terrible experience.
A.
undergo
B.
underline
C.
undertake
D.
undermine
【简答题】I hope that I shall never again have to _______(经历) such an unpleasant experience.
【简答题】I hope that I shall be able to travel around the world. I hope __________________________________.
【单选题】HIV病毒主要侵犯人机体的CD4T淋巴细胞,血液检测可发现
A.
CD4细胞升高，β2微球蛋白升高
B.
CD4细胞下降、β2微球蛋白下降
C.
CD4/CD8比值下降、β2微球蛋白下降
D.
CD4/CD8比值下降、β2微球蛋白升高
E.
CD4细胞升高，β2微球蛋白下降
【简答题】I hope that I shall never again have to _______ such an unpleasant experience(经历如此不愉快的体验).
【单选题】I hope that by posting the letter now at midday, I shall ensure ___ it before theweekend.
A.
you receive
B.
your receiving
C.
you to receive
D.
your having received
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