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【单选题】
在气液色谱固定相中载体的作用是A.
提供大的表面支撑固定液
B.
吸附样品
C.
分离样品
D.
脱附样品
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举一反三
【单选题】---When are we going to see the movie ZooTopia, this afternoon or tonight?---______ is OK. I'm free today.
A.
Both
B.
All
C.
Either
D.
Neither
【单选题】----Are you free tonight? ---- No, I'm sorry. I _______________ to go out night.
A.
arrange
B.
arranged
C.
have arranged
D.
am arranging
【简答题】排除怠速不稳故障，有缺缸现象，检测方法正确的是（）
【单选题】____ the apples, then ____ them into small pieces.
A.
Washing; cutting
B.
Wash; cut
C.
Washes; cuts
【多选题】如图所示焊缝形式,表述正确的是
A.
接头形式是T接接头
B.
坡口类型是K形带钝边的坡口
C.
焊缝焊完以后的宽度为C
D.
焊前右侧焊件开双Y形坡口，左侧焊件没有开坡口
E.
焊前组对间隙为b
F.
焊前组对间隙为P
G.
右侧焊件上下两面分别开α和α1的坡面角度，且留有厚度为P的钝边
【单选题】-- When are you going to see the movie Spider-Man, this afternoon or tonight? ______ is OK. I'm free today.
A.
All
B.
Neither
C.
Both
D.
Either
【单选题】--Are you free tonight? --Sorry, but I'm not _____. I've got so much homework to do.
A.
busy
B.
comfortable
C.
available
D.
easy
【简答题】Over time, ________ the population grew, people began cutting food into small pieces so it would cook more quickly.
【单选题】---When are we going to see the movie Zootopia, this afternoon or tonight? --- ____ is OK. I'm free today.
A.
Either
B.
Neither
C.
Both
D.
All
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