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【判断题】
光源的非单色性是影响干涉条纹可见度的主要因素之一。
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】轻钢门式刚架结构柱间支撑的间距一般为 30m ~ 40m ,不应大于( )。
A.
60米
B.
45米
C.
120米
D.
300米
【单选题】级差式空压机级间压力过低常由什_引起?
A.
级间冷却不良
B.
空压机冷却太快
C.
前一级流量降低
D.
后一级气阀积碳严重
【单选题】Don`t talk the phone while .It is very erous.
A.
in,drive
B.
on, drive
C.
on, driving
D.
in,driving
【单选题】SECTION B PASSAGES Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow. 听力原文: Soon it would be the holidays, but bef...
A.
She wanted to pass the exams.
B.
She had not worked very much.
C.
She wanted her sister to worry about her.
D.
All the students were working hard.
【判断题】7四边形的壳单元尽可能作成接近正方形形状的单元
A.
正确
B.
错误
【单选题】级差式空压机级间压力过低常由 引起。
A.
级间冷却不良
B.
空压机转速太快
C.
前一级流量降低
D.
后一级气阀积碳严重
【单选题】轻钢门式刚架结构柱间支撑的间距一般为30m~40m,不应大于( )
A.
300米
B.
120米
C.
60米
D.
45米
【单选题】Passage 1 Directions: Listen to a short passage and choose the best answer to each question you hear. 1.
A.
To help first-grade students overcome reading problems.
B.
To help first-grade students develop an interest in reading.
C.
To help all primary school students gain reading skills.
D.
To help all primary school students pass reading exams.
【单选题】Don ’ t her outside for a long time. It is very cold.
A.
keep ,  siting
B.
keep , sitting
C.
let , sits
D.
let , to sit
【单选题】Don ’ t go out ___ hat. It is very cold.
A.
without
B.
with
C.
with a
D.
without a
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