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【单选题】
下列选项中( )会诱导恒牙萌出。
A.
乳牙排列不齐
B.
把坏牙拔掉
C.
矫正牙齿
D.
乳牙整齐
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皮皮学刷刷变学霸
举一反三
【判断题】轻混合动力系统电机并没有为车辆行驶提供动力。
A.
正确
B.
错误
【单选题】The China International Search and Rescue Team has brought help and hope to people in disasters around the world since it( )18 years ago.
A.
set up
B.
is set up
C.
was set up
D.
will be set up
【单选题】One of the union members wished to put a change of the policy, but it was ______ by the chairman.
A.
turned in
B.
set apart
C.
brushed aside
D.
put aside
【简答题】A rescue team has been set up tohelp the people who became ____________ during the earthquake.A. meaningless B. homeless C. hopeless
【单选题】The China International Search and Rescue Team has brought help and hope to people in disasters around the world since it was ______ 18 years ago.
A.
set up
B.
given up
C.
looked up
D.
called up
【单选题】A rescue team has been set up to help the people who became during the earthquake.
A.
countless
B.
hopeless
C.
meaningless
D.
homeless
【单选题】下列关于焊接温度场说法错误的是______。
A.
正常焊接条件下,经过一定时间后,焊件上也会形成准稳定温度场。
B.
焊件上各点瞬时的温度分布称为焊接温度场。
C.
焊件上瞬时温度相同的点连接在一起而组成的线称为等温线。
D.
焊接时,焊件上各点温度一直随时间而变化,因此焊件上不可能形成准稳定温度场。
【单选题】下列关于焊接温度场说法错误的是____。
A.
焊件上各点瞬时的温度分布称为焊接温度场。
B.
焊件上瞬时温度相同的点连接在一起而组成的线称为等温线。
C.
正常焊接条件下,经过一定时间后,焊件上也会形成准稳定温度场。
D.
焊接时,焊件上各点温度一直随时间而变化,因此焊件上不可能形成准稳定温度场。
【单选题】下列关于焊接温度场说法错误的是( )。
A.
焊件上瞬时温度相同的点连接在一起而组成的线称为等温线。
B.
焊接时,焊件上各点温度一直随时间而变化,因此焊件上不可能形成准稳定温度场。
C.
正常焊接条件下,经过一定时间后,焊件上也会形成准稳定温度场。
D.
焊件上各点瞬时的温度分布称为焊接温度场。
【简答题】Listen to a talk about mountain rescue service. You will hear the talk. Take notes and complete the following outline. I. The rescue group needs to find out a number of details. A. The place where the...
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