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【单选题】
国内TRIZ发展的第二阶段是什么样的阶段?()A.
自下而上推进
B.
自上而下推进
C.
自上而下和自下而上结合
D.
静止不动
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举一反三
【简答题】短文听力填充(2): One of the most significant _____________1 of aircraft design is CG. It is the _____________ 2 point where the mass or weight of an aircraft may be said to center; that is, a point around w...
【简答题】在配制蓄电池的电解液时应该注意哪些事项？
【单选题】—May I go out tonight? —Of course you can, _____ you promise to be back before 10 o’clock.
A.
as soon as
B.
as well
C.
as long as
D.
as usual
【简答题】请任选中学生物课程教材某一节的内容,根据自己的理解,撰写一节课的教案( 45 分钟)。
【单选题】The speed of an aircraft is given to be 950 km/h. If the speed of sound at that location is 315 m/s, the Mach number is
A.
0.63
B.
0.84
C.
1.0
D.
1.07
E.
1.20
【判断题】If an aircraft exceeds its critical angle of attack in a climb, the wings may stall.( )
A.
正确
B.
错误
【单选题】In no country other than Britain, it has been said, ________ experience four seasons in the course of a single day.
A.
people can
B.
you can
C.
can it
D.
can one
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