节肢动物的主要特征不包括 [ ] A.身体由很多体节构成 B.体表有外骨骼 C.

题型:选择题

问题:

节肢动物的主要特征不包括  [ ]

A.身体由很多体节构成

B.体表有外骨骼

C.足和触角分节

D.身体呈流线型

考点:动物的形态结构和功能
题型:选择题

若双曲线x2 / 4-y2 / b2="1" (b>0) 的渐近线方程为y=±1/2 x ,则b等于         .

题型:选择题

企业的应付账款确实无法支付,经确认后转作( )。

A.营业外收入

B.投资收益

C.其他业务收入

D.资本公积

题型:选择题

阅读理解。

     Across the world, 1.1 billion people have no access to clean drinking water. More than 2.5 billion people

lack basic sanitation.

     The combination proves deadly. Each year, diseases related to inadequate water and sanitation kill between

2 and 5 million people and cause an estimated 80 percent of all sicknesses in the developing world. Safe

drinking water is a precondition for health and the fight against child death rate, inequality between men and

women, and poverty.

     Consider these facts:

     The average distance that women in Africa and Asia walk to collect water is 6 kilometers.

     Only 58 percent of children in sub-Saharan Africa are drinking safe water, and only 37 percent of children

in South Asia have access to even a basic toilet.

     Each year in India alone, 73 million working days are lost to water-borne diseases.

     Here are three ways you can help:

     (1) Write Congress

     Current U. S. foreign aid for drinking water and sanitation budgets only one dollar per year per American

citizen. Few members of Congress have ever received a letter from voters about clean drinking water abroad.

     (2) Sponsor a project with a faith-based organization

     Many U.S. religious groups already sponsor water and sanitation projects, working with partner organizations

abroad. Simply putting a single project by a U.S. organization can make safe water a reality for thousands of

people.

     (3) Support nonprofit water organizations

     Numerous U.S.-based nonprofits work skillfully abroad in community-led projects related to drinking water

and sanitation. Like the sample of non-profits noted as follows, some organizations are large, other small-scale,

some operate worldwide, others are devoted to certain areas in Africa, Asia, or Latin America. Support them

generously.

1. The three facts presented in the passage are used to illustrate that ____.

A. poverty can result in water-borne diseases

B. people have no access to clean drinking water

C. women's rights are denied in some developing countries

D. safe drinking water should be a primary concern

2. The intended readers of the passage are ____.

A. Americans

B. overseas sponsors

C. congressmen

D. U.S.-based water organizations

3. The main purpose of the passage is to call on people to ____.

A. get rid of water-related diseases in developing countries

B. donate money to people short of water through religious groups

C. fight against the worldwide water shortage and sanitation problem

D. take joint action in support of some non-profit water organizations

4. What information will probably be provided following the last paragraph?

A. A variety of companies and their worldwide operation.

B. A list of non-profit water organizations to make contact with.

C. Some ways to get financial aids from U.S. Congress.

D. A few water resources exploited by some world-famous organizations.

题型:选择题

客车车钩钩提杆装置装车后有何技术要求?

题型:选择题

当池水中溶氧量过饱和度达()以上,溶氧量达()毫克/升以上时,易引起鱼类气泡病。

更多题库