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【简答题】
在Activity的onCreate方法中编写代码 ________ 来因此标题栏,且此句代码必须在setContentView()方法之前执行,不然会报错。
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举一反三
【简答题】一台凸极同步电机并联到无限大电网运行，同步电抗Xd*=0.75，Xq*=0.3，忽略电枢绕组电阻，不考虑磁路饱和的影响，若此时电枢电流为额定运行时电枢电流的80%，cosφ=0.8（滞后），则此时同步发电机向电网输送的有功功率标幺值Pem*=（ ）。（答案四舍五入保留两位小数）
【单选题】Which sentence is not in the past continuous?
A.
Ana moved to California in 1995.
B.
Emi and Jin were studying in the library last night.
C.
Sam wasn't waiting for me at the airport.
【简答题】一台汽轮同步发电机并联到无限大电网运行，同步电抗Xt*=0.5，忽略电枢绕组电阻，不考虑磁路饱和的影响，若此时电枢电流为额定运行时电枢电流的90%，cosφ=0.8（滞后），则此时同步发电机向电网输送的有功功率标幺值Pem*= ( ) （答案四舍五入保留两位小数）
【单选题】In which of the following cases has communication occurred?
A.
Gary updates his blog regularly, even though no one reads it.
B.
Brian attends all the Algebra lectures, but is unable to understand the subject.
C.
Jen has sent an urgent e-mail to her Japanese colleague, but a translator is not yet available.
D.
Ana tells her manager that she needs a new computer, but he says that the company can't afford it.
【单选题】Which sentence is not talking about the future?
A.
Ana and her friends are going to visit her brother this weekend.
B.
Emi is studying a lot these days.
C.
Luis and Susan will be at the meeting on Friday.
【简答题】半自动闭塞车站应根据闭塞机闭塞表示灯、《行车日志》和各种 ，确认区间空闲。A. 行车表示牌
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