臀位分娩,当脐部娩出后,一般应在多长时间内结束分娩()
A.8分钟内
B.8~10分钟
C.10~15分钟
D.15~20分钟
E.20~30分钟
参考答案:A
The newly-discovered star was named _____a Chinese astronomer _____ honor of his contributions to astronomy.
A.for; in
B.after; for
C.as; in
D.after; in
下面哪种场合不适宜选用定温感温探测器()。
A.在正常情况下有烟和蒸汽滞留
B.可能产生阴燃火
C.有可能产生蒸汽和油雾
D.有可能发生无烟火灾