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【简答题】
Once there was an old farmer, with a horse which was almost as old as himself. He __16__ one morning with his young son, 17 the horse before it died. Father and son walked, 18 the farmer did not want the horse to be 19 .  They met two men on the road 20 said: “Why are you walking, farmer? You have a horse. It's __ 21 __to market.” The farmer knew that this was__22__, so he rode on the horse, __23__his son walked.  Then they met two old ladies. “__24__are you doing up there, farmer? Can't you__25__how tired your boy is?” __26__the farmer got down, and his son rode__27__. __28__, three old men stopped them. One said: “Why are you walking, farmer?__29__. It's too hot for an old man like you to walk today.” So the farmer got up____30__his son, and they__31__. __32__, a young woman passed them. “Why aren't you walking?” she asked. “It isn't __33_ to market. Give your poor old horse a rest.” So the farmer, and his son, got down__34__. It is a fact that you cannot please__35__the people all the time. 小题1: A.set out B.set up C.set down D.set 小题2: A.selling B.buying C.to sell D.to buy 小题3: A.so B.because C.that D.when 小题4: A.very tired B.too tired C.quite tired D.tiring 小题5: A.which B.who C.as D.where 小题6: A.a short way B.a long way C.the right way D.the wrong way 小题7: A.real B.true C.truly D.really 小题8: A.while B.when C.as D.during 小题9: A.What B.How C.Why D.When 小题10: A.see B.watch C.look D.notice 小题11: A.Because B.As C.For D.So 小题12: A.thus B.yet C.instead D.either 小题13: A.First B.Finally C.Near D.Next 小题14: A.Sit down B.Sit up C.Get up D.Get down 小题15: A.behind B.after C.beside D.above 小题16: A.walked on B.rode on C.moved on D.drove on 小题17: A.Some time later B.A moment ago C.In no time D.At once 小题18: A.near B.long C.far D.short 小题19: A.once again B.on their own C.the other day D.all the same 小题20: A.both B.each of C.all D.none of
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【简答题】函数f(x)=x 3 +ax 2 +bx+c,过曲线y=f(x)上的点P(1,f(1))的切线方程为y=3x+1; (1)若y=f(x)在x=-2时有极值,求f(x)的表达式; (2)在(1)的条件下,求y=f(x)在[-3,1]上的最大值; (3)若函数y=f(x)在区间[-2,1]上单调递增,求b的取值范围。
【多选题】社交媒体传播表明,总的来说网民是一种兼具( )的受众。
A.
兼职型
B.
介质型
C.
悲观型
D.
乐观型
【单选题】下列关于混合设备叙述错误的是()
A.
V形混合机V形桶的交叉角一般为80°或81°
B.
双螺旋锥形混合机物料在推进器公转作用下自底部上升,又在自转作用下在容器内产生漩涡和上下循环运动而达到均匀混合
C.
二维混合机的运动使物料在混合桶内既有扩散混合,又有对流混合
D.
槽型混合机搅拌桨的旋转,使物料产生上下、左右、内外各个方向运动
【简答题】已知函数f(x)=x 3 +ax 2 +bx+c,过曲线y=f(x)上的点P(1,f(1))的切线方程为y=3x+1. (Ⅰ)若y=f(x)在x=-2时有极值,求y=f(x)表达式; (Ⅱ)在(Ⅰ)的条件下,求y=f(x)在[-3,1]的最大值; (Ⅲ)若函数y=f(x)在[-1,0]上单调递减,求实数b的取值范围.
【简答题】设函数f(x)=(x-a) 2 lnx,a∈R,e为自然对数的底数,e=2.7182… (1)如果x=e为函数y=f(x)的极大值点,求a的值; (2)如果函数f(x)在x=e处的切线与坐标轴围成的三角形的面积等于2e 3 ,求a的值; (3)在(2)的条件下,当x∈[e,e 2 ]时,求f(x)的最大值和最小值.
【简答题】函数f(x)=x 3 +ax 2 +bx+c,过曲线y=f(x)上的点P(1,f(1))的切线方程为y=3x+1. (Ⅰ)若y=f(x)在x=-2时有极值,求f (x)的表达式; (Ⅱ)在(1)的条件下,求y=f(x)在[-3,1]上最大值; (Ⅲ)若函数y=f(x)在区间[-2,1]上单调递增,求b的取值范围.
【简答题】(本小题满分14分) 已知函数 f ( x )=- x 3 + bx 2 + cx + bc , (1)若函数 f ( x )在 x =1处有极值- ,试确定 b 、 c 的值; (2)在(1)的条件下,曲线 y = f ( x )+m与 x 轴仅有一个交点,求实数 m 的取值范围; (3)记 g ( x )=| f ′ ( x )|(-1≤x≤1)的最大值为M,若M≥k对任意的 b 、 c 恒成...
【判断题】熔断器应串接于电路中作为短路或严重过载保护。
A.
正确
B.
错误
【判断题】熔断器应串接于电路中作为短路或严重过载保护。
A.
正确
B.
错误
【单选题】关于V型混合机下列叙述错误的是( )
A.
属于旋转型混合机
B.
具有筒体具有三维运动特点
C.
最适宜的容积装量比为30%-40%
D.
用于流动性较好的干性粉状、颗粒状物料的混合
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