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【单选题】
在windows环境中,若应用程序出现故障或死机,这时按Ctrl+Alt+Del组合键的作用是( )。A.
排除故障
B.
关闭所有程序
C.
弹出“任务管理器”窗口
D.
重新启动计算机并进入安全模式
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举一反三
【单选题】The realization that the most economically significant sanctions cannot survive poses a new danger: that effective sanctions will be allowed to lapse, ______ a series of token measures.
A.
leaving in place
B.
setting aside
C.
taking into account
D.
making room for
【简答题】__________。 [A]poses [B]produces [C] makes [D] brings
【单选题】某PC机的声卡在处理声信息时,采样频率为44KHz,A/D转换精度为16位。若连续采集2分钟的声音信息,则 在不进行压缩编码的情况保存这段声音,需要的存储空间近()。
A.
88KB
B.
176KB
C.
11MB
D.
83MB
【简答题】The population which is top—heavy with older people poses a problem to _______.
【简答题】A.It poses a challenge to seniors. B.It saves both time and money. C.It is childish and u NPR ofessional. D.It is cool and convenient.
【单选题】The energy produced by the sun ______.
A.
is easy to store
B.
poses similar problems to the other newer energy sources
C.
poses very few problems
D.
poses different problems from the other newer energy sources
【单选题】某PC机的声卡在处理声音信息时，采样频率为44.1KHZ，量化位数为16位，声道数为2，连续采集2分钟的声音信息，在不进行压缩编码的情况下保存，需要的存储空间约为__ ___。
A.
88KB
B.
176KB
C.
21MB
D.
83MB
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