起井架过程中,无关人员应处于什么位置?
参考答案:在井架前方及两侧20米以外安全位置。
洗涤红细胞白细胞清除率的标准()。
A.≥40%
B.≥50%
C.≥60%
D.≥70%
E.≥80%
I remember when I was a child, I was very()with how many toys she had.
A.repressed
B.impressed
C.pressed
D.oppressed