固定液的选择一般可基于()原理。
参考答案:相似性
Agriculturalists are very popular with the farmers as they are________ agricultural science and technology.
A.in great need of
B.in greatly need of
C.greatly need of
D.very much need of
I ________ be a little bit slow, but at least I don’t make stupid mistakes.
A.should
B.may
C.must
D.need