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【单选题】
有关宫内节育器的避孕原理,下列描述正确的是A.
抑制排卵过程
B.
杀灭精子
C.
抑制受精卵着床
D.
改变卵子的运行方向
E.
抑制性激素的分泌
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Bungee jumping is an activity that you ______.
A.
jump down to the ground without holding to a rope
B.
fasten yourself to a rope and fall from a great height
C.
jump up as high as you can
D.
move down a rope to the ground
【简答题】Do you have a _____ for holding a meeting the day after tomorrow?
【单选题】中国证监会对申请设立子公司的证券公司在风险控制指标、净资本、经营管理能力、市场占有率、治理结构、风险管理、内部控制机制等方面有审慎性的要求，要求最近一年净资本不低于（ ）亿元。
A.
10
B.
12
C.
15
D.
20
【简答题】单句改错：找出错误并加以改正。 1. With the exam holding tomorrow, I can'tgo shopping with you. 2. Don't speak with your mouth fully.
【单选题】--- Be careful! Don’t forget you are on a ladder. --- But you are holding it for me, nothing .
A.
worry about
B.
to worry about
C.
is worried about
D.
worrying about
【单选题】一 Be careful! Don't forget you are on a ladder. 一 But you are holding it for me, nothing _____. [ ]
A.
wrorry about
B.
to worry about
C.
is worried about
D.
worrying about
【单选题】由于处于晶格位置和间隙位置的粒子势能的不同，在易位扩散、间隙扩散和空位扩散三种机制中，其扩散活化能的大小为（）。
A.
易位扩散=间隙扩散>空位扩散
B.
易位扩散>间隙扩散=空位扩散
C.
易位扩散>间隙扩散>空位扩散
D.
易位扩散
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