The children ________ many times not to go near the lake.
A. have told
B. have been told
C. told
D. tell
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The work _______ by the time you get there.
A. was done
B. had been done
C. will have been done
D. is done
不与红细胞的生理性变化有关的是
A. 性别
B. 年龄
C. 精神因素
D. 红细胞寿命缩短
E. 感情冲动
若计数5个中方格中红细胞总数为350个，按法定计量单位，应报告为
A. 350万/mm3
B. 350万/μl
C. 3.5×10ˇ6/L
D. 3.5×10ˇ9/L
E. 3.5×10ˇ12/L
在Hayemy液中，可提高比密、防止细胞黏附的是
A. 氯化钠
B. 结晶硫酸钠
C. 氯化高汞
D. 氯化钾
E. 结晶硫酸钾
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