1.单选题- (共4题)

图2-12
A.0 | B.1 cm |
C.2 cm | D.3 cm |
①小棋子共受到四个力作用;②每个棋子的质量肯定都有细微差异,所以不同棋子所受的摩擦力不同;③棋盘表面应选相对粗糙的材料;④如果某个棋子贴不上棋盘,总会滑落,肯定是其质量偏大.
A.①②④ | B.①③④ |
C.①②③ | D.②③④ |

图2-8
A.逐渐减小 | B.逐渐增大 |
C.先减小后增大 | D.先增大后减小 |
2.选择题- (共5题)
假定英语课上老师要求同桌之间交换修改作文,请你修改你同桌写的以下作文。文中共有10处语言错误,每句中最多有两处。错误仅涉及一个单词的增加、删除或修改。增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。删除:把多余的词用(\)划掉。
修改:在错的词下画一横线,并在该词下面写出修改后的词。
注意:1 每处错误及其修改均仅限一词;
2只允许修改10处,多者(从第11处起)不计分。
I grew up in Westley, California. After graduating with high school. I went to Beijing and started teaching in a kindergarten. I had never been to a city big as Beijing before. I fall in love with Chinese food. I would eat out at the different restaurant every night and practice my Chinese with local citizen. I suppose the air was clean back home, but my life in China was much more interesting. My most favorite part about living in Beijing was nothing that many other foreigners didn't like at all—the noise. I loved walking outside my door and hear the sounds of city life. Therefore, I'm back in Westley now, and all I hear is silence. I definitely miss Beijing.
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已知直线l与函数f(x)=1n x的图象相切于点(1,0),且l与函数g(x)=x2+mx+(m<0)图象也相切.
(1)求直线l的方程及m的值;
(2)若h(x)=f(x+1)﹣g′(x),求函数h(x)的最大值;
(3)当0<a<1时,求证:f(1+a)﹣f(2)<.
已知直线l与函数f(x)=1n x的图象相切于点(1,0),且l与函数g(x)=x2+mx+(m<0)图象也相切.
(1)求直线l的方程及m的值;
(2)若h(x)=f(x+1)﹣g′(x),求函数h(x)的最大值;
(3)当0<a<1时,求证:f(1+a)﹣f(2)<.
3.多选题- (共2题)

A.μmg | B.μ﹙mg-Fsinθ﹚ | C.μ﹙mg+Fsinθ﹚ | D.Fcosθ |
4.解答题- (共4题)

(1)此时物体所受的摩擦力多大?
(2)将F1撤去后,物体所受的摩擦力为多大?
(3)将F2撤去后,物体所受的摩擦力为多大?


(1)运动过程中轻绳与水平方向夹角θ;
(2)木块与水平杆间的动摩擦因数μ.
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【1】题量占比
单选题:(4道)
选择题:(5道)
多选题:(2道)
解答题:(4道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:4
7星难题:0
8星难题:5
9星难题:1