监测胎儿宫内安危情况最简便的方法是()。
A.胎心听诊
B.胎动计数
C.胎心电子监护
D.胎儿头皮血pH测定
E.B超
参考答案:B
We have just heard a warning on the radio that a sharp temperature decrease is ______ to come this
evening. [ ]
A. possible
B. likely
C. probable
D. believable
下列四组基因型中,在正常情况下具有相同表现型一组的是()
A.aaBb和Aabb
B.AaBb和aaBb
C.AaBb和AABb
D.Aabb和AABb