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【单选题】
某管理局车库里有6个油桶,分别汽油、柴油和机油。其重量为31升、20升、19升、18升、16升、15升。已知六桶油中有一桶汽油,柴油的重量比机油多一倍。请问柴油是多少?( )
A.
49升
B.
50升
C.
66升
D.
68升
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举一反三
【单选题】直线y=kx+1(k∈R)与椭圆 x 2 5 + y 2 m =1 恒有公共点,则m的取值范围是(  )
A.
[1,5)∪(5,+∞)
B.
(0,5)
C.
[1,+∞)
D.
(1,5)
【单选题】在下列贸易术语中,卖方承担义务最少的是( )
A.
EXW
B.
CIF
C.
FOB
D.
CFR
【多选题】HPLC的特点包括()
A.
Widely available
B.
Relatively easy to use
C.
High accuracy and precision
D.
Extended ytical time
E.
Relatively high cost
【单选题】若钝角三角形三内角的度数成等差数列,且最大边长与最小边长的比值为m,则m的范围是(    )
A.
(1,2)
B.
(2,+∞)
C.
[3,+∞)
D.
(3,+∞)
【简答题】( ) as the term we all familiar with, is a relatively large, low-cost, low-margin, high-volume, self-service operation designed to serve the consumer’s total needs for grocery and household products.
【简答题】In electronicpower supplies there is often a need to isolate the output from the input andreduce the weight and cost of the unit. In other applications, such as inaircraft, there is a strong incentive...
【单选题】Which of the following are primary concerns of the bank manager?
A.
maintaining sufficient reserves to minimize the cost to the bank of deposit outflows
B.
extending loans to borrowers who will pay low interest rates, but who are poor credit risks
C.
acquiring funds at a relatively high cost, so that profitable lending opportunities can be realized
D.
maintaining high levels of capital and thus maximizing the returns to the owners
【判断题】M/M/C/∞/∞与M/M/1/∞/∞的区别在于系统中服务台的数量为C。
A.
正确
B.
错误
【判断题】( )智能纱布利用互联网技术准确检测和计算外科手术时使用的纱布,提高计数的准确性,确保患者安全。
A.
正确
B.
错误
【单选题】不论k为何值,直线y=kx+1与椭圆 x 2 7 + y 2 m =1有公共点,则实数m的范围是(  )
A.
(0,1)
B.
[1,+∞)
C.
[1,7)∪(7,+∞)
D.
(0,7)
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