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【简答题】
A small plane crashed into a house Sunday afternoon, killin g the pilot and destroying half of the home. The family inside the house escaped without injury. The single-engine airplane crashed about 5:30 p. m. The pilot, the only one in the plane, was trying to make an emergency landing at the airport. The pilot's body was found on the bed in the master bedroom. The plane crashed into one end of the house, where the three bedrooms were. That part of the house was wrecked. The Carols, who own the house, were all at home eating dinner. "Oh, my gosh," said Mrs. Carol, "I thought the world had come to an end. I never heard such a loud sound. We all ducked under the table, thinking it was another earthquake. When nothing else happened, we got brave and decided to investigate." They immediately called 911 when they discovered the cause of the thunderous sound. The family was lucky because there was no fire. Authorities suspect that a lack of fuel contributed to the crash. Mr. Carol said that they might have to move out until they can get the house repaired.
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【简答题】本章讨论了许多成本类型:几乎成本、总成本、固定成本、可变成本、平均总成本、边际成本等。在一下句子中填入最合适的成本类型。 1.采取某个行为所放弃的东西称为_________。 2._________是当边际成本低于它时下降,当边际成本高于它时上升。 3.不取决于产量的成本是_________。 4.在冰淇淋行业里,短期中,_________包括奶油和糖的成本,但不包括工厂的成本。 5.利润等于总收...
【单选题】Which of these is not Linux shell?
A.
Bourne shel
B.
Turbo Pascal Shell
C.
C Shell
D.
Korn Shell
【单选题】把文件shell.sh名称修改为shell2.sh,下列哪个命令可以实现?( )
A.
cp shell.sh shell2.sh
B.
mv shell.sh shell2.sh
C.
ls shell > shell2.sh
D.
cat shell.sh > shell2.sh
【单选题】规模效应是指企业随着产量增加,产品平均成本不断降低的效应。相关企业由于其地域相同,产品的生产成本、信息成本及管理成本均随着产量增加而不断降低,增强了产品的竞争力,企业群体的规模优势也构成了它的成本优势。 下列属于规模效应的一项是( )。
A.
由于PC行业生产能力增加,零配件供应充足,需求增长,综合成本持续下降
B.
面对国内众多的个人拍卖网站的竞争,淘宝网决定采取3年不收费的用户体验,降低了客户拍卖产品的成本
C.
沃尔玛凭着直接采购模式,省去了不必要的中间环节,极大地降低了产品成本
D.
现在的笔记本电脑大多集成了摄像头,有效降低了消费者购买的成本
【单选题】命令:echo "The \$SHELL is $SHELL"的结果为:
A.
The \$SHELL is $SHELL
B.
The $SHELL is $SHELL
C.
The \$SHELL is /bin/bash
D.
The $SHELL is  /bin/bash
【单选题】Linux中有许多shell,以下shell中哪一个是Linux操作系统的默认shell?
A.
C shell
B.
Korn shell
C.
Bourn shell
D.
Z shell
E.
TC shell
F.
Bourn-Again shell
【单选题】目前我国使用的液压油的牌号是以( )° C 时运动粘度的平均厘斯数来表示的。
A.
30
B.
40
C.
50
D.
60
【判断题】我国液压油的牌号,就是以这种油液在40°C时运动黏度的平均值来标志的。
A.
正确
B.
错误
【单选题】储气瓶的安全阀开启压力应为最大充装压力的( )倍。
A.
1.00~1.05
B.
1.05~1.10
C.
1.10~1.15
D.
1.15~1.20
【单选题】下列命令( )可以把文件shell.sh重命名为shell2.sh。
A.
cp shell.sh shell2.sh
B.
mv shell.sh shell2.sh
C.
ls shell > shell2.sh
D.
cat shell.sh > shell2.sh
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