具有喜润恶燥特性的内脏是()。
A.胆
B.肺
C.脾
D.胃
E.肾
参考答案:B, D
Only when __________________ permission _______________ allowed to enter the lab.
A.a teacher has given; are the students
B.has a teacher given; are the students.
C.has a teacher given; the students are
D.a teacher has given; the students are
果实的果皮一般是由()发育而。
A.珠心
B.胚珠
C.珠被
D.子房壁