妊娠中期,由胎盘产生的孕酮发挥维持妊娠作用的动物是()
A. 马
B. 奶牛
C. 黄牛
D. 绵羊
E. 山羊
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Many vessels are provided with flume tanks,which also have a dump tank located under the flume tanks. In the event the ship is damaged,you could dump the flume tanks into the dump tank which would ().
A. Reduce the free surface effect and raise the KG
B. Not have any effect on free surface and raise the KG
C. Reduce the free surface effect and lower the KG
D. Not have any effect on free surface and lower the KG
小儿手术麻醉前禁食禁饮造成的水分丧失量大约为()。
A. 2ml/(kg·h)
B. 4ml/(kg·h)
C. 5ml/(kg·h)
D. 6ml/(kg·h)
E. 8ml/(kg·h)
反应堆为冷却、润滑安全l、2、3级设备所需部件属于()设备。
A. 核安全1级
B. 核安全2级
C. 核安全3级
D. 非安全级
视线裁判将位于:
A. 赛台的正前方
B. 裁判长旁边
C. 在赛台的对角