地下有限空间气体环境复杂时,作业单位宜()具有相应检测能力的单位进行检测。
A.委托
B.指定
C.安排
参考答案:A
I want to see him _____ he arrives. Which of the following is wrong? [ ]
A. at the moment
B. directly
C. immediately
D. instantly
再生障碍性贫血与非白血性白血病有鉴别意义的是()
A.贫血、出血
B.白细胞数减少
C.血小板数减少
D.网织红细胞减少
E.骨髓内可见大量白血病细胞