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【简答题】
Many people think that Americans 21 their cars almost more than anything else. When 22__ people are fourteen years old, they want to have their __23_ cars. They don’t ask for a car from their 24__ . So many of them work in _25_ time during their last year of high school to buy a car. Learning to 26 _ and getting a driver’s license may be one of the most exciting things in a young person’s life. Some people almost 27 _ go to a doctor when they are ill. But they will __ 28_ their cars to a garage as soon as they think there is a 29 . On Saturdays or Sundays some people may 30 most of their time washing and repairing their cars. 小题1: A.prefer B.love C.drive D.play 小题2: A.little B.big C.old D.young 小题3: A.new B.own C.expensive D.cheap 小题4:A, friends     B. teachers     C. parents     D. brothers 小题5: A.free B.busy C.study D.good 小题6: A.make B.mend C.wash D.drive 小题7: A.always B.never C.often D.usually 小题8: A.take B.carry C.pull D.lift 小题9: A.question B.wrong C.mistake D.problem 小题10: A.cost B.get C.spend D.use
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举一反三
【简答题】已知函数 f(x)= 1- x 2 1+x+ x 2 (x∈R) . (Ⅰ)求函数f(x)的单调区间和极值; (Ⅱ)若(e t +2)x 2 +e t x+e t -2≥0对满足|x|≤1的任意实数x恒成立,求实数t的取值范围(这里e是自然对数的底数); (Ⅲ)求证:对任意正数a、b、λ、μ,恒有 f[ ( λa+μb λ+μ ) 2 ]-f( λ a 2 +μ b 2 λ+μ )≥( λa+μb...
【单选题】已知函数f(x)在R上满足2f(4-x)=f (x)+x 2 -l0x+17,则曲线y=f (x)在点 (2,f (2))处的切线方程是(  )
A.
y=2x-3
B.
y=-6x+13
C.
y=3x-2
D.
y=-2x+3
【单选题】文件系统中,按照存取控制熟悉,只允许被核准用户调用,不允许读和写,这是( )。
A.
系统文件
B.
只执行文件
C.
特殊文件
D.
只读文件
【单选题】钩端螺旋体病稻田型的传染源是()
A.
B.
C.
D.
E.
【单选题】补货人员在不同的时段内检查流动式货架上的货物数量,如果发现货物存量不足,马上予以补足。这种补货方法是
A.
批次补货
B.
定时补货
C.
随机补货
D.
定量补货
【简答题】当R 2 =1,F=0;当R 2 =0,F=∞。
【多选题】下列指标中,会随着单价变动而呈现反方向变动的因素有( )。
A.
保利点
B.
单位贡献边际
C.
变动成本率
D.
保本点
【单选题】钩端螺旋体病,稻田型的传染源是
A.
B.
C.
D.
E.
【多选题】下列指标中,会随着单价变动而呈现反方向变动的因素有 ( ) 。
A.
盈亏临界点
B.
变动成本率
C.
单位贡献毛益
D.
安全边际率
【简答题】________ [fərˈɡet]
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