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【单选题】
不属于无人机系统的是(无提示)
A.
飞行器平台
B.
飞行员
C.
导航飞控系统
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【简答题】阅读理解 Reading Oliver James' Affluenza ,I thought about what often happens at home.My 12-year-ole daughter is in tears.'I have so take a test tomorrow.I don't understand any of it,'she cries out.After s...
【单选题】下列关于班级管理的描述,错误的是( )。
A.
班级管理是直线式发展的静态过程
B.
班级管理的主要手段有计划、组织、协调、控制
C.
班级管理是一种有目的的教育活动,它的根本目的是实现教育目标
D.
班级管理是一种组织活动的过程,体现了教师与学生之间的双向活动
【单选题】以下器件中属于电流驱动器件的是()。
A.
GTO和GTR
B.
IGBT
C.
MOSFET
D.
IGBT和GTR
【多选题】下列属于电流驱动型器件,且还是全控器件的是
A.
SCR
B.
GTR
C.
MOSFET
D.
GTO
【单选题】下列全控型器件中属于电流驱动型器件的是( )
A.
GTR , MOSFET
B.
GTO , GTR
C.
MOSFET , IGBT
D.
IGBT , IGCT
【单选题】以下不属于电流驱动的器件是
A.
SCR
B.
GTO
C.
GTR
D.
IGBT
【判断题】电力电子器件中 属于电压驱动的 是 电力MOSFET 、IGBT ,属于电流驱动的是 晶闸管、GTO 、GTR 。
A.
正确
B.
错误
【单选题】According to the passage, which of the following statements is true about the two writers?
A.
Mark Twain writes about the reality of the then America.
B.
Henry James' writings are about soldiers at the frontier.
C.
Henry James tries to analyze the Americans' spirits.
D.
Mark Twain's writings are in a chronological order.
【简答题】Dear Uncle Ric , We were very sorry to hear that you are in hospital again , but I feel sure you'll be out and about again soon. It doesn't sound very serious this time according to Auntie Ivy and in...
【单选题】According to the conversation, James' flash mob will take place ______.
A.
inside a subway station
B.
at the mall
C.
at the park
D.
none of the above.
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