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【单选题】
短效口服避孕药的主要作用机制是()
A.
抑制排卵
B.
杀灭精子
C.
不利于精子穿透
D.
不利于孕卵着床
E.
杀灭卵子
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【简答题】青藏铁路有哪几个 主要 的技术难题?
【单选题】动物界中身体结构最复杂、进化地位最高等的门类是
A.
腔肠动物门
B.
软体动物门
C.
节肢动物门
D.
脊索动物门
【简答题】完形填空。 In tradition education , the teacher may feel that the students are not very grown up.  1 ___ teachers are older than students,  2___ teachers feel that students are  3___ and do not know much a...
【单选题】Most of the students feel nervous when they are reminded that it will be about half a year ____ they take the national college entrance examination. [     ]
A.
since
B.
that
C.
before
D.
until
【单选题】Many educators feel that ______ students gain confidence in themselves and their abilities, they are less likely to cheat.
A.
least
B.
as
C.
so
D.
hence
【简答题】英译汉:Most students feel satisfied with the progress they’ve made.
【单选题】下面哪种不是必需微量元素( D )
A.
B.
C.
D.
【简答题】In tradition (传统的) education, the teacher may feel that the students are not very grown up. Usually, teachers are older than students, and teachers feel that students are young and do not know much ab...
【多选题】是油气渗流数学模型必须包括的组成部分
A.
运动方程
B.
质量守恒方程
C.
初始条件
D.
边界条件
【单选题】下面哪种不是必需微量元素
A.
B.
C.
D.
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