在等差数列{an}中，a1=2，a3+a5=16，则a7=()。
A.8B.12C.14D.16

In China, ______ private cars is gettingto be ______ popular means of transportation.
A.the; a B./; a C.the; the D./; the

根据以下材料，回答题If you don′t think a phone is the rightgift for a lover, the smart choice this year is a smart phone.For people who don′t read instructionsThe easiest-to-use phone is the iPhone. It′sthat has pushed it to the No.1 selling position, surpassing the Motorola Razr.The iPhone′s touch screen is easy to operate and it′s also easy to customize (用户化). The iPhone can run allsorts of applications such as those help you to lose weight, identify a song onthe radio, find a restaurant or do many other things.For the futuristThe T-Mobile G1 is very popular as it is thefirst phone to offer a Google browser, meaning that you′re getting the real webon your phone, but it′s the phone′s potential that qualifies it for the futurist.The exciting applications are interesting, but they don′t always work smoothly.Sometimes it is hard to use the applications it comes with. The system shouldimprove as it becomes more popular, so it holds great promise. With fewrestrictions on the design of applications for the phone,the G1 could be the first phone toincorporate (整合) some of the coolest.For the road warriorThe new BlackBerry Storm is something likethe equivalent (等同物) of a mullet--a business up front, party in the back. It stillincorporates the serious mail and organization features that have endeared (使受钟爱) these phones to business people. The 3.25-inch is bright anddetailed and it′s a decent size for watching videos on the go.For the Luddite (反对技术进步的人)For those who can′t handle buttons and newfeatures, there is the Samsung Jitterbug Dial. Some people are Luddites whojust want a few large buttons to make calls. That′s it, just calls. That makesit even easier to use an iPhone. Among the four types of phones, whichone do you like best Why (no more than 25 words)________________________________________________________________________

《义务教育数学课程标准(2011年版)》指出数据分析是统计的核心，数据分析的过程可以概括为收集数据、__________、__________、__________。

f(x)=x2，则f′(x)在x=2处的导数值为__________。

But not all pretended deeds have to fallshort of their normal function in order to ______ their communication purpose.
A.serve B.succeedC.complete D.accomplish