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Half an hour of exercise a day can add an extra five years on your life, a ground breaking research has
revealed.Health experts said that walking or cycling gently has massive longterm benefits.According to the World Health Organization, research carried out in Britain and Denmark shows that gentle workouts
(锻炼) and even housework every day can boost life spans by as much as five years.
The news will provide encouragement for those couch_potatoes to start taking exercise.Britain is in
the grip of an obesity epidemic (肥胖症), with just 35% of men and 24% of women taking regular
exercise.
"Encouraging people to be physically active every day has so many health benefits, " said Dr.Marc
Danzon, WHO regional director for Europe."These include reducing the risk of developing certain
diseases and of becoming obese, as well as contributing to physical coordination, balance, strength and
mental wellbeing.It is a very costeffective public health tool."
The organization is so concerned that the public is not getting the message on exercise that it will
launch a "Move for Health" campaign to boost public awareness.
"The WHO encourages adults to take at least 30 minutes of moderate physical exercise a day,
defined as any body movement that results in energy expenditure (消耗), " said Dr Danzon."This
includes walking, cycling, playing, housework, climbing stairs as well as sports." He added that children
should take at least 60 minutes of exercise every day.
1. The underlined phrase "couch potatoes" probably means______.
A. lazy bones who spend a lot of time sitting
B. people who like eating potatoes
C. persons who usually rest on a couch
D. players who take exercise with potatoes
2. Taking physical exercise every day benefits one's health in the following aspects except________.
A. strengthening body coordination
B. developing certain diseases and becoming obese
C. keeping body balance
D. keeping fit mentally
3. Which statement is NOT true according to the passage?
A. Children should take more physical exercise than adults every day.
B. The WHO has tried to improve people's knowledge about exercise by launching a campaign.
C. People with an obesity epidemic in Britain seldom take regular exercise.
D. Physical exercise brings the best possible profit to public health at the lowest cost.
4. The passage mainly tells us________.
A. how to take exercise
B. what the WHO is
C. how to lose weight
D. how to add years to your life
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APP具体操作流程为:
从2011年7月1日起,银行业金融机构免除个人储蓄账户的手续费。()
A.开户手续费
B.销户手续费
B.密码修改手续费
D.密码重置手续费
典型的胞内寄生,细胞胞质呈泡沫状的细菌是()
A.结核分枝杆菌
B.破伤风梭菌
C.白喉棒状杆菌
D.铜绿假单胞菌
E.麻风分枝杆菌
常温下按照如下方案完成实验。
实验编号 | 反应物 | 催化剂 |
① | 10mL2% H2O2溶液 | 无 |
② | 10mL5% H2O2溶液 | 无 |
③ | 10mL5% H2O2溶液 | 1mL0.1mol·L-1FeCl3溶液 |
④ | 10mL5% H2O2溶液+少量HCl溶液 | 1mL0.1mol·L-1FeCl3溶液 |
⑤ | 10mL5% H2O2溶液+少量NaOH溶液 | 1mL0.1mol·L-1FeCl3溶液 |
(1)催化剂能加快化学反应速率的原因是_____________________________________。
(2)实验①和②的目的是____________________________。实验时由于较长时间没有观察到明显现象而无法得出结论。资料显示,通常条件下H2O2稳定,不易分解。为了达到实验目的,你对原实验方案的改进是____________________。
(3)写出实验③的化学反应方程式 。
(4)实验③、④、⑤中,测得生成氧气的体积随时间变化的关系如下图。
分析上图能够得出的实验结论是______________________________________。
支气管扩张引起大咯血的原因为
A.支气管动脉先天性解剖畸形
B.支气管动脉与肺动脉终末支扩张血管瘤破裂
C.合并重度支气管炎
D.支气管发生囊性扩张
E.支气管黏膜溃疡
某工程双代号网络计划中,工作M的最早开始时间为第6天,其持续时间为5天,其紧后工作N的最早开始时间和最迟开始时间分别为第14天和第16天,则工作M的自由时差为( )天。
A.3
B.4
C.5
D.6