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【简答题】
外涡旋气流切速度服从 , 越靠近筒体边缘气速越小 。
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举一反三
【单选题】There are many ways to express our feelings of loneliness, such as writing diaries, writing imaginary letter, drawing a picture and so on.
A.
Y
B.
N
C.
NG
【简答题】蜜蜂或其它昆虫在花丛中飞舞、爬行时,就会把雄蕊的花粉传播到 的柱头上,这会使雌蕊子房里的 受精后发育成长形成 。
【单选题】三相感应电动机等效电路中的附加电阻 (1-s) R'2/s上所消耗的电功率应等于( )。
A.
输出功率P2
B.
输入功率P1
C.
电磁功率Pem
D.
总机械功率PΩ
【单选题】The author implies that in the development of man, ______.
A.
speech, agriculture and writing are the most important factors
B.
the origin of the language can not be traced
C.
both oral language and written language come out of the picture language
D.
the ape might be taught to master speech
【简答题】A．Reading in the afternoon. B．Reading in the morning. C．Reading in the evening. D．Doing morning reading right after getting up.
【单选题】______, tears came to her eyes.
A.
Reading the letter
B.
While reading the letter
C.
As she was reading the letter
D.
To read the letter
【单选题】The shop owner came up to see______.
A.
what was happened
B.
what was going on
C.
what the matter was
D.
what is the matter
【单选题】The Grammar-Translation Method neglects______.
A.
listening and reading
B.
speaking and writing
C.
reading and writing
D.
listening and speaking
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