受精卵形成的部位是（）
A.腹腔内
B.输卵管内
C.宫腔内
D.宫颈内
E. * * 内
参考答案：B
下面哪条命令是可以验证小区是否建立。（）
A.LST UCELL
B.DSP UCELL
C.LST LOCELL
D.DSP LOCELL
________ he can’t understand is ________ his son doesn’t like the school. He is very upset about this.[ ]
A．That；why
B．Why；that
C. What ；why
D．Whether；that
