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【多选题】
经纬仪整平的目的是()。A.
使竖轴处于铅垂位置
B.
使水平度盘水平
C.
使横轴处于水平位置
D.
使竖直度盘位于铅垂面内
E.
使仪器中心与测站点标志中心位于同一铅垂线上
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【单选题】In our school, the students have three_____ courses, and seven______ entrepreneurial education courses .
A.
required; alternative
B.
requiring; alternative
C.
required; alternate
D.
requiring; alternate
【单选题】Tony couldn't go to university but______ his education through evening school courses.
A.
has continued
B.
continued
C.
continues
D.
had continued
【单选题】____ you won't be able to succeed.
A.
It is alike that
B.
It is like that
C.
The chances are that
D.
The chance is that
【单选题】You won't be able to finish the job _______ you stop playing around.
A.
unless
B.
lest
C.
in case of
D.
so that
【单选题】For our middle school students, some courses are compulsory, while others are ______. [ ]
A.
flexible
B.
optional
C.
impressive
D.
significant
【简答题】阅读理解。 Courses Meeting your needs We understand that our students are of different age-groups and abilities, come from different backgrounds and have different personal and professional reasons for wis...
【单选题】飞行操纵系统中主操纵系统在飞行中的功用是
A.
用来操纵副翼、方向舵和升降舵的运动
B.
操纵飞机绕纵轴、立轴和横轴转动，以改变或保持飞机的飞行姿态
C.
操纵飞机沿纵轴、立轴和横轴运动，以改变或保持飞机的飞行姿态
D.
操纵飞机起飞、着陆和上升、下降
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