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【简答题】What is an e–reader? An e–reader is a small computer. It can hold thousands of e–books. So people want to throw away heavy schoolbags and read with small, light e–readers. For example, a US high...
【单选题】What can a reader learn about in this text?
A.
the life of schoolchildren in Mongolia
B.
the difficulties for blind travellers
C.
the international work of some eye doctors
D.
the best way of studying medicine
【判断题】若电路中某元件两端的电压 u = 36sin(314t - 180 ° )V ,电流 i = 4sin(314t + 180 ° )A ,则该元件是电感元件。
A.
正确
B.
错误
【单选题】By using signal words to ______ what may come next, the reader can decide whether he should speed up his reading, slow or pause to make sure what is being read is understood.
A.
presume
B.
present
C.
precede
D.
predict
【单选题】—The problem is too difficult，can you show me _____，Wang Le? —Sure.
A.
what to work it out
B.
what to work out it
C.
how to work it out
D.
how to work out it
【单选题】关于请求分页系统中页面置换算法的LRU描述错误的是( )。
A.
该算法是先来先服务原则
B.
该算法选择最近最久未使用的页面淘汰
C.
该算法需要硬件支持如寄存器
D.
该算法实现起来成本比较高，故而实际中多采用该算法的近似算法
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