下面不属于液体压力计的是()。
A.单管压力计
B.弹簧管压力计
C.浮力式压力计
D.环称式压力计
参考答案:B
骨髓象检查粒红比值为10:1,见于 ()
A.缺铁性贫血
B.红白血病
C.粒细胞缺乏症
D.白血病
E.溶血性贫血
It's seven o'clock a.m. It's time _____ Tom _____ English. [ ]
A. of; to read
B. for; to read
C. for; reading
D. of; reading