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【多选题】
列车在下面（）情况下需要简略试验。A.
货车列检对始发列车、中转作业列车连挂机车后
B.
列车软管有分离情况时
C.
列车停留超过15 min时
D.
列车进行摘、挂作业开车前
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举一反三
【简答题】Unit 5 Topic 1 Section C 学校 班级 学 生 一、 根据汉语或音标提示完成句子。 1. The father was / ˈləʊnlɪ / and often became angry. 2. She taught the children to sing / ˈlaɪvlɪ / songs. 3. They performed short funny plays to...
【单选题】Before John left home, his father told him never to forget the family __________ - always be a good man.
A.
metal
B.
motto
C.
meter
D.
memory
【简答题】A．He sees his sister very seldom. B．He sent Mark something on his 19th birthday. C．He always walked to work. D．He lives with his sister and her family.
【简答题】A．He sees his sister very seldom. B．He sent Mark something on his 19th birthday. C．He always walked to work. D．He lives with his sister and her family.
【多选题】下列有关蛋白质四级结构的叙述,正确的是
A.
由2条或2条以上具有三级结构的多肽链组成
B.
胰岛素具有四级结构
C.
一条多肽链就是一个亚基
D.
蛋白质亚基的排列是对称性的
【简答题】A．He sees his sister very seldom. B．He sent Mark something on his 19th birthday. C．He always walked to work. D．He lives with his sister and her family.
【简答题】试列举毛细管电泳法的分析特点。
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