_____ of the students who took part in t

______ I saw Jane，she was picking cotton in the field.

A．For the first time

B．At the first time

C．By the first time

D．The first time

个人家居消费贷款可用于小额经营。（）

强心苷不溶于（）

A.丙酮

B.甲醇

C.乙醇

D.乙醚

E.水

钢按化学成分可分为碳素钢和合金钢。

实体建模