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（I)f)+2x2+2=0可化为a=-2+2x2+2记0=-2+22+23x,x∈(0，V2]4x+xe(5,4]X3x1=a由h)的图像得a∈(4,3V2)且x+4=a,4+X3x,为是方程x+4=a的两根，即方程r2-x+4=0的两根416所...

34.What can we infer from Paragraph 5?A.The method of the new study is perfect.B.The findings are suitable for all ages.器C.Further studies should be...

44.A见第42题解析。45.B每天，汤姆上尉都会推着(pushed)步行架在院子里走上I0圈，以达到(reach),他每天的目标。46.D见上题解析。47.A正如一些重大事件所发生的那...

54.D。根据上文中的Everything became so much clearer and for some reason,and easier tounderstand可知，作者在学古典音乐的过程中找到了人生的方向，他开始...

Placing a refrigerator directly next to a heater orother heat sources will make too much ice form in therefrigerator.38.C Actually,the heat sources wi...

o）p(,-.o）E(o09）球心，球的半径R=√2,所以四面体2kπ+2了元（质∈Z),即函数的解析式为则c-(兮o).成-ABCD的外接球的表面积为S=ysin(r)-sinx+14R2=4πX2=2π(层。-（...

course oIGladstone's famous naturalmonly referred to as the"lionthe world to share her lifelioness that are facing eachstorysoas toinspire people to c...

One day,he was 45 on the highway 46he saw a bunch of money wrapped in a plasticbag.It had been 47 on the road unnoticed.There were thousands of dollar...

物和氧气的分子个数比为n：2n=1:2,即物质的量之加成反应使其褪色，说明有乙烯生成，C符合题意；苯与比为1：2，故氧气的物质的量为0.2mol,质量为0.2mol液溴的反应...

与D项“发起”意思接近，故选D项。l0.推理判断题。根据文章最后一段Rather than changing the content of the calculus course,theyfocused on preparing students...