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【单选题】
计时器的Interval属性以()为单位指定Timer事件之间的时间间隔.
A.
B.
C.
毫秒
D.
微秒
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参考答案:
举一反三
【单选题】三圈环流假设地表均匀且存在地球自转,三圈环流部分证明是正确的,主要在()。
A.
南北纬5-25C的东北信风
B.
我国大部分地方处于西风带
C.
副热带地区的沙漠(撒哈拉大沙漠)
D.
以上都正确
【单选题】设函数【图片】,则下列说法正确的是( )
A.
若 在点 处偏导数存在,则在该点必连续;
B.
若 在点 处连续,则在该点偏导数必存在;
C.
在点 处偏导数存在性与连续性无关;
D.
其它三个选项均不正确。
【简答题】阅读理解。 One of the founding fathers of the internet has predicted the end of traditional television. Vint Serf, who helped to build the internet while working as a researcher in America, said that telev...
【单选题】对某种产品按质量好坏分成:一等品、二等品、三等品和次品,这里所使用的数据尺度是()。
A.
类别尺度
B.
顺序尺度
C.
等距尺度
D.
等比尺度
【单选题】设函数 满足微分方程 ,且 ,则对函数 的下列说法正确的是( ).
A.
在x 0 处取得极大值
B.
在x 0 的某邻域内单调增加
C.
在x 0 处取得极小值
D.
在x 0 的某邻域内单调减小
【单选题】The police station asks for public help because______.
A.
ordinary people like the television programme
B.
ordinary people are interested in pictures of paintings, jewellery, etc.
C.
the policemen can not catch the thieves themselves
D.
ordinary people may help the policemen get useful information about the criminals
【单选题】Tom succeeded under the help of______.
A.
a special computer technology
B.
a special television technology
C.
his teachers
D.
his parents
【单选题】The word media basically refers to ____ we commonly call newspapers, magazines, radios and televisions.
A.
which
B.
what
C.
why
D.
that
【单选题】B Good evening, ladies and gentlemen, I’m Roy , and this is my show. This is a television show for all families, and I know you’ll enjoy it. Let’s start with a story. Once there was a proud pig on a f...
A.
a family show on TV
B.
for kids only
C.
a sports show
【单选题】Which of the following is NOT advisable for you?
A.
Drinking water.
B.
Watching less television.
C.
Eating no breakfast.
D.
Eating more grains.
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