The winch at hatch No.3 is()trouble.
A.at
B.in
C.on
D.over
参考答案:B
动物发育毒性试验一般不包括()。
A.一般生殖毒性试验
B.致畸试验
C.围生期毒性试验
D.胚体-胎体毒性试验
E.胚胎细胞微团培养
Language, like food, is a basic human need without which a child at a critical period of life might be ______ and damaged. A. starved B. stunned C. shocked D. segregated