孕妇妊娠足月,时见腰腹阵阵胀痛,小腹逼坠,有便意及有"见红"征象,查胎位已向下移,临产离经之脉应手搏动。此为
A.临盆
B.试胎
C.弄胎
D.难产
E.痛经
参考答案:A
I'm very busy. I ____________ play games with you.[ ]
A. think I can't
B. don't think I can
C. not think I can
D. am thinking I can
下图是一种单基因遗传病的系谱图,对于该病而言,有关该家系成员基因型的叙述,正确的是
A.Ⅰ—1是纯合体
B.Ⅰ—2是杂合体
C.Ⅰ—3是杂合体
D.Ⅱ—4是杂合体的概率是1/3