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【单选题】
When the writer says we cannot return to the good old days, he means that ______.A.
our society is becoming much worse than before
B.
in our modem society it is hard to lead a quiet life
C.
the old days were much happier than the present time
D.
it is impossible for us to deal with noise as we did before
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【单选题】The major source of chemical contaminants in hydraulic fluid is _____.
A.
microscopic steel shavings
B.
abrasive waste
C.
anti-oxidant compounds
D.
oxidation by-products
【单选题】把当前目录下的所有文件包括子目录复制到/usr/local/目录中,应该使用下面哪个命令
A.
cp ./* /usr/local
B.
cp / /usr/local
C.
cp –r ./* /usr/local
D.
mv ./* /usr/local
【单选题】由于电脑要考虑的运转参数很多,为了简化电脑的计算程序, 通常将喷油量分成 ( ) 喷油量、修正量、增量三个部分,并分 别计算出结果,将三个部分叠加在一起,作为实际喷油量来控制喷 油器喷油量
A.
基本
B.
模拟
C.
参照
D.
预计
【多选题】龋齿流行特点是
A.
发达国家的龋患率最高，而不发达国家则较低
B.
幼儿园儿童高于小学生，小学生高于中学生
C.
城市学生高于农村学生
D.
大城市高于中小城市
E.
按照wH0的标准衡量，我国的龋病发生属较低水平，但少年儿童龋患率处于上升趋势
【单选题】听力原文：A: What nationality are you? B: I'm Canadian. I was born in Toronto. A: Oh, yes. That's the capital, isn't it? B: No, no. Ottawa. Which city is the capital of Canada?
A.
Ottawa.
B.
Toronto.
C.
Alpert.
【单选题】Oil is derived from the ______ of microscopic sea creatures, and is even older, according to most geologists.
A.
layouts
B.
reminders
C.
remains
D.
leftovers
【判断题】在计算机中,将人们使用最多、最普遍的十进制数字、大小写字母、各种标点符号、算术运算符等127种符号,用7位二进制数来编码表示,这就是国际上通用的ASCII码。
A.
正确
B.
错误
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