计算题（1）∫12(1x+1x+1x2)dx （2）-23+i1+i23+(21
题型：解答题
问题：
| 计算题 （1）∫12(
（2）
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题型：解答题
Google has been collecting tons of data about smartphone usage around the world． Here are some of the most surprising and interesting facts:
Android is most popular in Japan, with 55% of respondents（调查对象） using it, compared with 39% for iOS．Android is also number one in a few other countries, including New Zealand （41%）, the US（40%）, and China （38%）．
iOS is farthest ahead in Switzerland, with 52% usage vs 23% for Android．Other countries where iOS is far ahead include Australia （49% vs 25% Android）, Canada （45% vs 23% Android and 23% Blackberry）, and France （43% vs 25% Android）．
In Egypt, Windows Mobile is far more popular than iOS．13% of survey respondents use the Microsoft smartphone platform, behind Symbian （19%） and Android （14%）． iOS is very far down at 4%．
Mobile social networking is biggest in Mexico and Argentina, where 74% and 73% of users visit a social network daily．But mobile-social is weak in Japan where 34% of users never visit a social network on their phone, and this figure rises to41% in Brazil．
Watching video is most popular in Saudi Arabia, with 59% of respondents doing it daily．Number two is Egypt, with 41%．
Chinese users shop from their phones．59% of Chinese users do this, compared with only 41% in second-place Egypt．Chinese users also love to write reviews．41% of them write a review of a local business after looking it up on their smartphone．Number two, Japan, is far behind, with only 24% of respondents doing this．
小题1:Which of the following best describes the usage of the smartphone operating systems in Egypt?
A．Windows Mobile＞iOS＞Symbian＞Android
B．Android＞Windows Mobile＞iOS＞Symbian
C．iOS＞Android＞Symbian＞Windows Mobile
D．Symbian＞Android＞Windows Mobile＞iOS小题2:In which of the following countries is mobile social networking least popular?
A．Brazil．
B．Japan．
C．Mexico．
D．Argentina．小题3:In which section of a newspaper can we most probably read the passage?
A．Health．
B．Environment．
C．Technology．
D．Entertainment．