甲、乙签订买卖合同，甲向乙支付全部价款，约定乙应于2005年12月30日前交付货物。

售票员交接不清的定义？

Half of the world’s population is affected by Asian monsoons（季风）, but monsoons are difficult to predict. American researchers have put together a 700-year record of the rainy seasons, which is expected to provide guidance for experts making weather predictions.

Every year, damp air masses，known as monsoon，produce large amounts of rainfall in India, East Asia, Northern Australia and East Africa. All this wet air is pulled in by a high pressure area over the Indian Ocean and a low pressure area to the south.

According to Edward Cook , a weather expert at Columbia University in New York., the complex nature of the climate systems across Asia makes monsoons hard to predict. In addition, climate records for the area are too recent and not detailed enough to be of much use. Therefore, he and a team of researchers spent more than fifteen years traveling across Asia, looking for trees old enough to provide long-term records. They measured the rings, or circles, inside thousands of ancient trees in more than 300 places.

Rainfall has a direct link to the growth and width of rings on some kinds of trees. The researchers developed a document they are calling a Monsoon Asia Drought Atlas. It shows the effect of monsoons over seven centuries, beginning in the 1300s.

Professor Cook says the tree-ring records show periods of wet and dry weather. “If the monsoon basically fails or is a very weak one, the trees affected by monsoons at that location might put on a very narrow ring. But if the monsoon is very strong, the trees affected by that monsoon might put on a wide ring for that year. So, the wide and narrow ring widths of the chronology that we developed in Asia provide us with a measure of monsoon variability.” With all this information, researchers say they can begin to improve computer climate models for predicting the behavior of monsoons.

“There has been widespread famine and starvation and human dying in the past in large droughts. And on the other hand, if the monsoon is particularly heavy, it can cause extensive flooding.” said Eugene Wahl, a scientist with America’s National Oceanic and Atmospheric Administration. “So, to get a sense of what the regional moisture patterns have been, dryness and wetness over such a long period of time in great detail, I would call it a kind of victory for climate science.”

小题1:What’s the passage mainly about？

A．The effects of Asian monsoons.

B．The necessity of weather forecast.

C．The achievements of Edward cook.

D．A breakthrough in monsoon prediction.小题2:It is difficult for experts to predict Asian monsoons because _______.

A．it is hard to keep long-term climate records.

B．they are formed under complex climate systems.

C．they influence many nations.

D．there is heavy rainfall in Asia.小题3:What can be inferred from the passage?

A．Long and detailed climate records can offer useful information for monsoon research.

B．The Monsoon Asia Drought Atlas has a monsoon record for about 1,300 years.

C．The trees affected by monsoon grow fast if the monsoon is weak.

D．The rainfall might be low although the monsoon is strong in monsoon-affected areas.小题4:According to Professor Cook, the rings of the trees _______.

A．determine the regional climate.

B．have a great influence on the regional climate.

C．offer people information about the regional climate.

D．reflect all kinds of regional climate information.小题5:Which of the following best describes the tone of this passage?

A．Matter-of –fact

B．Pessimistic

C．Humorous

D．Friendly.

下列有关会计职业道德“廉洁自律”的表述中，正确的有( )。

A．自律的核心就是自觉地抵制自己的不良欲望

B．廉洁自律是会计职业道德的内在要求

C．只有自身廉洁自律，才能抵制他人的不法行为

D．不能做到廉洁自律，也就很难做到客观公正和坚持准则

染色体主要由DNA和蛋白质组成，是遗传物质的主要载体，其主要的原因是（）

A.染色体中的DNA的含量稳定

B.细胞分裂时染色体可进行复制

C.细胞内的遗传物质大部分存在于染色体

D.染色体在细胞分裂中进入不同的子细胞

特种设备的安全监管部门是以各级人民政府为主，其他部门有相应职责。