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【简答题】
无人机飞行员操纵升降舵时,飞行器将绕()。
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举一反三
【单选题】______ she was living in Paris that she met her husband Terry.
A.
Just then
B.
It was while
C.
Soon after
D.
During the time when
【单选题】某经纬仪观测竖直角度盘(顺时针注记)读数78 ̊52'00",则竖直角是( )。
A.
12˚52'00"
B.
78˚52'00"
C.
12˚08'00"
D.
11˚08'00"
【单选题】影响梯形螺纹配合性质的主要尺寸是螺纹的( )尺寸。
A.
大径
B.
中径
C.
小径
D.
作用中径
【单选题】影响梯形螺纹配合性质的主要尺寸是螺纹的( )。
A.
大径
B.
中径
C.
小径
D.
牙型角
【单选题】—Please go and say hello to your aunt.She’s in the living room now. —She has arrived! But when ______ she ______?
A.
will; arrive
B.
did; arrive
C.
had; arrived
D.
has; arrived
【单选题】-Is your sister at home, Dennis? -No, she isn't. I think she _ _ the piano in Anna's living room. [     ]
A.
can play
B.
could be playing
C.
had played
D.
plays
【单选题】What do we know about Meg?
A.
She is a young girl now.
B.
She's living in Florida.
C.
She is a mother of two children.
【单选题】磁通是穿过与磁场方向垂直的某一截面的( )总数
A.
气隙磁密
B.
磁力线
C.
导体数
D.
永久磁铁
【单选题】影响梯形螺纹配合性质的主要尺寸是螺纹的( )尺寸。
A.
大径
B.
中径
C.
小径
D.
牙型角
【判断题】影响梯形螺纹配合性质的主要尺寸是螺纹的中径尺寸
A.
正确
B.
错误
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