大体积混凝土温控中，减少混凝土发热量的措施有( )。 A．采用干硬性贫混凝土 B．

下列各句中的加点词语使用恰当的一项是（   ）

A．马克思在他所研究的每一个领域，甚至是数学领域，都有深入的研究与独到的发现，这样的领域是很多的，而且其中任何一个领域他都不是半途而废。

B．他总是乐于助人，不计得失，无论从旧道德，还是从新道德，只要是损人利己的，他就挑选上，自己背起来。

C．一个传奇式文坛巨人长眠了。熟习沈从文先生的亲人、朋友，今天在八宝山公墓向他鞠躬告别，献上鲜花，寄托哀思。

D．当法兰西遭到人们的凌辱时，遭到外敌的入侵时，完全需要有人挺身而出，为她增光载誉。

.

This is a web version of October15,2009 which Live Earth emails to members. Click here to join and receive weekly updates from Live Earth 

Live Earth is pleased to announce the largest worldwide water initiative(倡议) in history to help fight the global water crisis. The Dow Earth Run for Water-----to take place on April 18,2010----will consist of a series of 6 km run/walks ( the average distance many women and children walk every day to get water ) talking place over the course of 24 hours in countries around the world featuring concers and water education activities, raising awareness and funds to help solve the water crisis. Jessica Biel, Alexandra Cousteau, Pete Wentz, Angelique Kidijo and Jenny Fletcher will lend their time in support of this global event.

Water shortage is a major issure affecting countries, communities and families all over the wold .One in eight people don’t have access to safe,clen drinking water, Communities in Farica,

Latin America and Asia suffer 1.8 million deaths every year from diarrhea diseases and the death of 5,000 children each day due to inadequate(不足) water infrastructure (基础设施) . In these areas, women and children are forced to walk 6 km (3.7 miles ) each day to get water that is likely unsuitable for drinking .However, the water crisis not only limited to developing nations. Adding to these existing issures, the effects of climate change are increasing affecting both supply and quality of available fresh water throughout the world.

In 60﹪of European cities with population greater than 100.000, groundwater is being used faster than it can be replenished{补充}。 By 2025,two-thirds of the world’s population could be living under water__stressed conditions.

You can help solve the water crisis by participating in the April 18th even.Run/walk registration is now officially open! Sign up now at

Thanks and be sure to visit liveearth. Org for the latest water conservation tips and more on The Dow Live Earth Run!

LIVE EARTH

72.Which of the following activities will the Dow Live Earth organize on April 18,2010 ?

A.Receing the latest news from Live Earth.

B.Putting on musical performances.

C.Calling on pop stars to walk 6 km to get water.

D.Lending names and time to support the event.

73. According to the passage , which of the following statements is tue?

A. You can turn to http://live earth.org for water statements is true?

B. Jessica Biel can’t take part in event if she signs up.

C. The information on Live Earth is updated every month.

D. Every year 1.8 million people in the world die from the disease related to water.

74. Which of the following would be the best title for the passage?

A.An Introduction tohe April 18 Event

B. An Email to Live Earth

C.Global Water Crisis Is Becoming Serious

D.Live Earth Announces an Initiative to Water Crisis

某甲是乙公司销售人员，为便于随时签订合同，某甲随身携带盖有乙公司公章的空白合同书及介绍信。后甲辞职，但空白合同书及介绍信没有全部收回。甲以该空白合同书与丙公司签订了一份合同，根据合同法的规定，该合同( )。

A．不成立
B．有效
C．效力待定
D．无效

溶液的浓度高，粘度大，溶液循环速度慢不会影响蒸发器结疤。