正确的学龄前儿童的口腔保健措施是（）。 A.选用硬毛牙刷 B.含氟牙膏用量为豌豆大小

治疗脾胃虚寒选（）。

A．理中汤

B．玉屏风散

C．藿香正气散

D．牵正散

E．青黛散

在数据库的外模式、模式和内模式三级模式的体系结构中，存在两次映象，它们是外模式到模式的映象和 【15】 的映象。

私人劳动与社会劳动的矛盾是简单商品经济的基本矛盾。( )

Kataria is the founder of the worldwide laughter movement. The celebration of World Laughter Day is a positive activity for world peace and is intended to build up a global sense of brotherhood and friendship through laughter. The first “World Laughter Day” gathering took place in Mumbai, India, on 11th January, 1998. 12,000 members from India and international Laughter Clubs attended it. Now there are over 5,000 Laughter Clubs worldwide on all 5 continents.

“HAPPY—DEMIC” was the first World Laughter Day gathering outside India. It took place on 9th January, two years after the Mumbai gathering. In Copenhagen, Denmark, more than 10,000 people gathered at Town Hall Square. The event went into Guinness Book of World Records. “World Laughter Day” is now organized on the first Sunday of May every year. Hundreds of people gather worldwide on that day to laugh together.

Today, many people fear widespread international terrorism. The world has never faced so much unrest before. People are at war within themselves. Laughter is a universal language, which has the ability to unite humanity without religion. Laughter can build a common connection between various religions and create a new world order. The idea may sound over -ambitious(野心太大的), and maybe it is. But maybe it is not. It is our deep belief that laughter and only laughter can unite the world, building up a global sense of brotherhood and friendship.

Studies also say that laughter helps your body do the following: lower blood pressure; lighten depression; reduce stress; work out the heart, especially for those who are unable to perform physical exercise. So in life, when you can laugh, you should laugh loudly and with your entire body-because it’s good for you.

小题1:The purpose of celebrating World Laughter Day is ________.

A．to build up a global sense of brotherhood and friendship through laughter

B．to build a common connection between various religions

C．to reduce stress and lighten depression

D．to lower blood pressure小题2:The first World Laughter Day gathering outside India took place________.

A．on 11th January, 1998

B．on the first Sunday of May

C．on 9th January, 1996

D．on 9th January, 2000小题3:The author’s attitude towards laughter movement is ________.

A．positive

B．negative

C．uninterested

D．objective小题4:The passage is mainly about ________.

A．World Laughter Day and its significance

B．the worldwide laughter movement

C．a universal language

D．laughter.