指出不属于疳积上目的临床表现()
A.白睛萎黄
B.有夜盲
C.黑睛呈镜面哈气状
D.黑睛表面枯晦
E.可伴有黄液上冲
参考答案:C
The children all turned( )the famous actress as she entered the classroom.
A.looked at B.to look atC.to looking at D.look at
两个黄色圆粒豌豆进行杂交,得到6000粒种子均为黄色,有1500粒为皱粒。两个杂交豌豆的基因组合可能为()
A.YYRR×YYRr
B.YyRr×YyRr
C.YyRR×YYRr
D.YYRr×YyRr