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【单选题】
下列叙述( )是错误的A.
飞机平衡破坏后,机头向右偏转,我们称飞机右侧滑
B.
飞机取得俯仰平衡后,迎角保持不变
C.
飞机的横向平衡是指作用于飞机的各滚转力矩之和为零
D.
机翼变形和襟翼安装不对称破坏的是飞机的横侧平衡
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举一反三
【单选题】Valentine's Day is in February. February is the ______ month of the year.
A.
one
B.
first
C.
second
【简答题】选择填空。 January May April December 1. February is the second month of a year. ________ is the first month and________ is the last month. April 30th November 1st October 26th 2. Nanc...
【单选题】Which of the following is NOT true according to the article?
A.
The financial situation is rather critical owing to the high gas prices.
B.
The economic situation is not bad enough to trigger a recession.
C.
Demand adjustments are the same in all the states of America.
D.
The U.S. need to reconsider its policy concerning environment and economic growth.
【多选题】焊接支管连接口的补强应符合( ) 规定。
A.
当支管道的公称直径大于或等于1/2 主管道公称直径时,应采用三通
B.
支管道的公称直径小于或等于50m时,可不作补强计算
C.
补强的结构型式可采用减少主管道或支管道壁厚
D.
开孔削弱部分按等面积补强
【单选题】The article was written io explain____________.
A.
the greenhouse effect.
B.
che sola:r effects on the earth.
C.
the models of solar-weather interactions.
D.
the causes affecting weather.
【多选题】焊接支管连接口的补强应符合( )规定。
A.
当支管道的公称直径大于或等于1/2 主管道公称直径时,应采用三通
B.
支管道的公称直径小于或等于50mn时,可不作补强计算
C.
补强的结构型式可采用增加主管道或支管道壁厚
D.
开孔削弱部分按等面积补强
【单选题】The article can be best titled as ______.
A.
Education in the Renaissance
B.
Humanism in the Renaissance
C.
Debate on Education
D.
The New Education
【多选题】焊接支管连接口的补强应符合( ) 规定。
A.
当支管道的公称直径大于或等于1/2主管道公称直径时,应采用三通
B.
支管道的公称直径小于或等于50m时,可不作补强计算
C.
补强的结构型式可采用增加主管道或支管道壁厚
D.
开孔削弱部分按双倍面积补强
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