已知△ABC中,a=23,若m=(-cosA2,sinA2),n=(cosA2,

题型:解答题

问题:

已知△ABC中,a=2
3
,若
m
=(-cos
A
2
,sin
A
2
)
n
=(cos
A
2
,sin
A
2
)
满足
m
n
=
1
2
.(1)若△ABC的面积S=
3
,求b+c的值.(2)求b+c的取值范围.
考点:正弦定理余弦定理
题型:解答题

How often do you go on holiday? Going on holiday makes you feel good while you're there-you gain the health benefits for months, new research shows.

Jetting off to exotic destinations such as the Maldives cuts your blood pressure, helps you sleep better and bounce back from stress, it found. The benefits last at least a fortnight longer than the vacation and can be felt for months in some cases where it is claimed. Experts say workers should always take their full holiday entitlement each year-as many as one in three don't-to get the benefits.

The study compared key health markers in holidaymakers visiting Thailand, Peru or the Maldives, with people who stayed at home and continued working. The average blood pressure of those on holiday dropped by 6% while the workers saw their blood pressure rise by 2% over the same period. The sleep quality of holiday-makers improved by 17% while that of the non-holidaymakers deteriorated by 14%.

The study also found the ability of vacationers to recover from stress—known as the stress-resilience test-improved by 29%. There was a 71% fall in stress resilience scores among workers. Test showed a fall in blood glucose levels, reducing the risk of diabetes, trimmer waistlines and enhanced mood and energy levels, with the effects sustained for at least 2 weeks after returning home.

The Holiday Health Experiment was conducted by tour operator Kuoni and Nuffield Health, the UK's largest healthcare charity.

小题1: The author intends to tell us that _____.

A.it is best to go to foreign countries like Maldives.

B.we had better go on holiday for the benefits of health

C.we have to go on holiday as much as possible

D.you'll certainly get depressed if you don't go on holiday小题2:According to the article, how many people go on holiday?

A.Two thirds

B.17%

C.One third

D.A quarter小题3:The underlined word "deteriorated" in Paragraph 3 probably means "______".

A.remained

B.rose

C.improved

D.worsened小题4:Which of the following can we infer from the passage?

A.Holiday makers are more adaptable than non-holidaymakers.

B.The result of the study is mostly based on the description from the people involved.

C.The further you go, the better you benefit.

D.Most people like to stay at home during the holiday.小题5:The best title of the passage is ______.

A.A Holiday Health Experiment

B.Key Health Markers in Holidaymakers

C.Health Benefits from Holiday

D.Health Problems of Having Holiday

题型:解答题

肾的说法中,哪些正确()。

A.出入肾门的结构为肾蒂

B.左侧肾蒂较右侧为短

C.肾蒂从前向后依次为肾、肾盂

D.左肾前面与脾相邻

E.右肾前面与胰头相邻

题型:解答题

关于民事诉讼送达的说法,正确的()。

A.送达诉讼文书必须有送达回证

B.诉讼文书寄出的日期为送达日期

C.受送达人被监禁的,应当公告送达

D.直接送达诉讼文书有困难的,应当公告送达

题型:解答题

用于抵押的土地使用权有期限的,使用权人( )在权利存续期限内设定抵押权。

A.不可以

B.自愿约定

C.有第三人担保

D.仅可以

题型:解答题

某企业从事化学物品的生产,2010年度销售其应税产品亏损80万元,投资国债取得国债利息收入30万元, 2011年度销售其应税产品盈利80万元.投资国债取得国债利息收入40万元,2010年和2011年企业申报所得税均为0万元。请分析企业申报正确。

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