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【单选题】
下列四种牌号的材料:1GCr15,2W18Cr4V,31Cr18Ni9Ti,460Si2Mn,合金元素总含量由小到大排序正确的是 .A.
④①③②
B.
①④②③
C.
①④③②
D.
④①②③
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【简答题】What is the problem many students with library?
【单选题】---When are you going to travel to Beijing? ---The train ______ at six tomorrow morning, and I _______ for the station at four o’clock.
A.
leaves, leaves
B.
is going to leave, am going to leave
C.
is going to leave, leaves
D.
leaves, am going to leave
【单选题】按TSGT5001-2009《电梯使用管理与维护保养规则》规定，电梯维保单位应当建立每部电梯的维保记录，并且归入电梯技术档案，档案至少保存（）年。
A.
2
B.
3
C.
4
D.
5
【单选题】TSG5002-2017《电梯维护保养规则》规定：电梯维保单位，应当建立每部电梯的维保记录，并归入电梯技术档案，档案至少保存（ ）年。
A.
2
B.
3
C.
4
D.
5
【简答题】What is the first problem? ______.
【单选题】单项选择。 — How are you going to the train station to meet your aunt? — I'm going there ____ my car. [ ]
A.
by
B.
in
C.
to
D.
on
【简答题】What is the second problem? ______.
【单选题】.--- Robert, you didn’t travel by train? --- I was going to, but then I decided to go by car______.
A.
yet
B.
either
C.
instead
D.
indeed
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