A．rejectB．preventC．hesitateD．refuse
一般情况下,双击文件READ、TXT时,系统会调用写字板程序来打开它。（）
A．分泌性腹泻肠粘膜组织学基本正常B．渗透性腹泻指肠壁细胞间渗透压升高C．腹泻的各种机制往往互为因果D．病程两个月以上称慢性腹泻E．变态反应可发生腹泻
A．激情
B．心境
C．应激
D．压力
A．鸭子身上的鸭绒B．果树上结的果子C．股息D．过春节时发给教职工的年终奖
（本小题满分l2分）
已知数列{an}的前n项和Sn=nbn，其中{bn}是首项为1，公差为2的等差数列．
（I）求数列{bn}的通项公式；
（Ⅱ）求数列{an}的通项公式．
A．They must accept the alert service.B．They may enjoy the alert service for free.C．They must send the alerts to others.D．They may choose the types of messages.
所有对象的快捷方式都可以创建在桌面上。（）
A. ninety-milesB. ninety-mile"sC. ninety milesD. ninety-mile
A．turn upB．turn onC．turn toD．turn down
A．look forB．long forC．search forD．call for
A．parkingB．where to parkC．to parkD．where parking
A．骈赋
B．古赋
C．骚赋
D．文赋
根据以下内容回答题：
A third of Britains are overweight，states a report published in January by the RoyalCollgeg of Physicians，the resuh of an l8-month-long study．About five percent of children weigh too much，and are likely to stay that way for life；in the mid-twenties age group the pro-portion of fat people rises to a third，and of the middle-aged population half are overweight． Fat people risk severe health problems，says the report，including high blood pressure，breathlessness．and various forms of heart disease．Smoking is particularly risky for overweightpeople． The safest way to lose weight is to eat cereals，bread，fruit and vegetables，and cut down on fatty meats，butter and sweet foods，Bad diets do far more harm than good slimming ma-chines that vibrate muscles have not been proved useful．Saunas（桑拿浴）merely remove a little body water，and health farms，says the report，serve as expensive holidays．
Exercise is most important to health，the report emphasizes；though it doesn’t necessarily reduce weight，it maintains the correct proportion of body fat to body muscle．And it isn’t only for the young；from middle age a minimum of 20 minutes of general physical jerks should be practiced three times a week． The report advocates several public health measures to combat the high prevalence of over-weight in this country．They include an increase of tax on alcohol to reduce its increasing，and dangerously fattening，consumption；and the provision of more sports facilities by local authori-ties．Britain’S doctors，the report concludes，must learn to be more sympathetic and specific in their advice to the overweight，encouraging a change in eating habits on a long-terra basis，and taking into account the many often complex reasons why fat people are fat．
The passage mainly talks about____ ．
A.the cause of Britain’S overweight
B.how to avoid getting overweight
C.Britain’S overweight problem
D.the relations between overweight and health problems