贫血合并急性呼吸窘迫综合征时,可采用()
A.加压输血
B.加氧输血
C.置换输血
D.常规输血
E.成分输血
参考答案:B
所有的角都有余角或补角吗?若不是,那么什么范围内的角才有余角或补角呢?
The girls who laughed loudly suddenly became aware ________ people looking at them. [ ]
A. of
B. that
C. of that
D. why