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【判断题】
变化的电场一定激发变化的磁场。A.
正确
B.
错误
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皮皮学刷刷变学霸
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【简答题】如图，AD是∠EAC的平分线，AD∥BC，∠B=30°，求∠C的度数．
【简答题】如图，AD是∠EAC的平分线，AD ∥ BC，∠B=30°，计算∠EAD、∠DAC、∠C的度数．
【单选题】Choose the bestanswer to each of the following questions.音频61.Which of the following is not true according to the speech?
A.
The speaker has been starting businesses since he was 12 years old.
B.
The speaker make solar energy devices in high school.
C.
The speaker made solar energy devices in high school.
D.
The speaker make computers in college.
【简答题】如下图，AD是∠EAC的平分线，AD∥BC，∠B=30 °，计算∠EAD、∠DAC、∠C的度数。
【简答题】目前,在我国铁路的主要线路上大多使用9、12、18号三个型号的道岔,它们所允许的侧向通过速度分别为( )。
【简答题】如图，AD是∠EAC的平分线，AD∥BC，∠EAC=60°，你能算出∠B，∠C的度数吗？
【简答题】如图，如果AD∥BC，∠B=∠C，那么AD是∠EAC的平分线吗？请说明你判别的理由．
【单选题】Which of the following contains an adverbial clause of cause?
A.
． I got a job as soon as I left university ．
B.
． As there was no answer, I wrote again ．
C.
． You must do the exercises as I show you ．
D.
． Wealthy as he is ， Mark is not a happy man ．
【简答题】如图，AD是∠EAC的平分线，AD ∥ BC，∠B=30°，求∠DAC、∠C的度数．
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