0  433073  433081  433087  433091  433097  433099  433103  433109  433111  433117  433123  433127  433129  433133  433139  433141  433147  433151  433153  433157  433159  433163  433165  433167  433168  433169  433171  433172  433173  433175  433177  433181  433183  433187  433189  433193  433199  433201  433207  433211  433213  433217  433223  433229  433231  433237  433241  433243  433249  433253  433259  433267  447090 

7. (2010·南京模擬) So far I haven’t adapted to the fast ______ of the modern life in Tokyo.

A. step      B. style     C. pace        D. manner

試題詳情

6.(2010·濟(jì)南模擬)Please read the _______ on the bottle and take the right amount of medicine.

A. explanations    B. descriptions   C. instructions    D. introductions

試題詳情

5.(2010·蕪湖模擬)In the     of proof,  the police could not take action against the man.

A.lack    B.shortage    C.a(chǎn)bsence     D.failure

試題詳情

4.(2010·沈陽模擬) Despite such a big difference in ____ towards what one eats, there is no doubt that people

in the west regard the Chinese food as something special.

A. point     B. idea   C. attitude      D. sight

試題詳情

3.(2010·銀川模擬)Although I had read the book assigned by the professor several times , it didn’t make any _____  to me.

A.meaning    B.importance     C.sense    D.significance

試題詳情

2.(2010·溫州模擬)   Typhoon Morakot has caused great _________ to the local economies in Wenzhou.

            A. injury      B. wound    C. ruin      D. damage

試題詳情

1.(2010·天津模擬)The increase in home computers means that families have much easier     to information.

A.measure      B.a(chǎn)ccess     C.way    D.method

試題詳情

9.設(shè)ab∈R,記max{a,b}=函數(shù)f(x)=max{|x+1|,|x-2|}(x∈R)的最小值是________.

試題詳情

8.(2009·南昌二調(diào))函數(shù)f(x)=,若f(4x1)+f(4x2)=1,x1>1,x2>1,則f(x1·x2)的最小值為( )

A.                             B.

C.2                            D.

答案:B

解析:依題意得f(x)=1-,

1-+1-=1,

由此解得log2x2=,log2(x2x1)=log2x2+log2x1=+log2x1=+log2x1=-2++(log2x1+1)≥-2+2=2,故f(x1x2)=1-≥1-=,f(x1·x2)的最小值是,故選B.

試題詳情

7.在區(qū)間[1.5,3]上,函數(shù)f(x)=x2+bx+c與函數(shù)g(x)=x+同時(shí)取到相同的最小值,則函數(shù)f(x)在區(qū)間[1.5,3]上的最大值為( )

A.8                            B.6

C.5                            D.4

答案:D

解析:g(x)=x-1++1≥2+1=3,當(dāng)且僅當(dāng)x=2時(shí),g(x)min=3,

f(x)=(x-2)2+3.

∴在區(qū)間[1.5,3]上,f(x)maxf(3)=4.

故選D.

試題詳情


同步練習(xí)冊(cè)答案