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【简答题】
出生后发育最为迅速的阶段为（）
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皮皮学刷刷变学霸
举一反三
【单选题】What can NOT communications technology do according to the passage?
A.
To help people communicate without seeing each other.
B.
To help conduct the conversation without talking with each other directly.
C.
To help people get other's phone numbers.
D.
To help shorten the distance between people.
【单选题】They are well ______ with each other since they were little kids living in the same community..
A.
identified
B.
recognized
C.
acknowledged
D.
acquainted
【单选题】It is said the houses aidng this street will soon be demolishe/
A.
pulled down
B.
pulled up
C.
pulled off
D.
pulled in
【简答题】PDCP子层的主要功能?
【单选题】An aircraft constructed with a tractor configuration has the engine mounted with the airscrew in front of it so that the aircraft is "pulled" through the air
A.
引擎
B.
工程师
C.
螺旋桨
D.
发电机
【单选题】What invention incorporated the principles of light and radio radiation?
A.
satellite communication
B.
X-ray
C.
the laser beam
D.
continuous wave
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