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【单选题】
已知实数a≥0,b≥0,且a+b=1,则(a+1) 2 +(b+1) 2 的取值范围为 (  )
A.
[ 9 2 ,5]
B.
[ 9 2 ,+∞)
C.
[0, 9 2 ]
D.
[0,5]
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举一反三
【单选题】循环语句 for (x=0,y=0; (y!=123)||(x<4);x++);的循环执行( )
A.
无限次
B.
不确定次
C.
4次
D.
3次
【单选题】Unless we spend money to spot and pr asteroids now, one might crash into Earth and destroy life as we know it, say some scientists.Asteroids are bigger versions of the meteoroids that race across...
A.
while pushing asteroids off course nuclear weapons would destroy the world
B.
asteroids racing across the night sky are likely to hit Earth in the near future
C.
The worry about asteroids can be left to future generations since it is unlikely to happen in our lifetime
D.
Workable solutions still have to be found to pr a collision of asteroids with Earth
【单选题】20130150在Excel中,若A1单元格的值为12.13, B1单元格的值为-12.13,在C1单元 格中输入函数“=SUM (INT (Al) +INT (B1))”,按回车键后,C1单元格中的值为(50)。
A.
-1
B.
0
C.
1
D.
24.26
【单选题】( )—Are you going anywhere?
A.
________ about visiting my sister, but I have changed my mind.
B.
think
C.
have thought
D.
will think
E.
thought
【单选题】某地址http://www.163.com/mail/index.htm,代表主机名称的是( )
A.
www
B.
163.com
C.
www.163.com
D.
http
【单选题】执行完如下语句后:( )
A.
页面上显示的内容为http://www.163.com
B.
页面跳转到网易主页上
C.
页面上显示网易超链接
D.
该句有错,出现错误信息
【单选题】—I caught a bad cold yesterday and didn't go anywhere. —Sorry to hear that. Are you feeling _______ now? [     ]
A.
good
B.
well
C.
healthy
D.
better
【单选题】机体活动时,最主要的产热器官是
A.
B.
C.
骨骼肌
D.
皮肤
E.
【单选题】20130150在Excel中,若A1单元格的值为12.13, B1单元格的值为-12.13,在C1单元 格中输入函数“=SUM(INT(A1)+INT(B1))”,按回车键后,C1单元格中的值为(50)。
A.
-1.0
B.
0.0
C.
1.0
D.
24.26
【单选题】净出口与净进口之差反映了(    )。
A.
进口总额与出口总额之间的差额
B.
同种商品进口量与出口量之差
C.
有形贸易与无形贸易之间的差额
D.
总贸易与专门贸易之间的差额
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