导游人员进行导游活动必须佩戴（），必须经（）委派，按接待计划实施。

对铁路滑坡地段路基进行滑坡稳定性分析时，下述( )是正确的。

A．滑坡稳定性分析时，除考虑永久荷载外还应考虑临时荷载

B．稳定性分析应采用力学计算法确定

C．滑坡推力应采用滑坡推力传递法计算确定

D．滑动面岩土的抗剪强度值应取岩土室内试验的残余强度值

不能有效增强桩冠的固位的是（）

A.延长冠桩的长度

B.减小根管壁锥度

C.增加粘结剂稠度

D.增加冠桩与根管壁的密合度

E.增大冠桩的直径

阅读理解

     The need to feed a growing population is putting much pressure on the world's supply of water.With

97% of the world's water too salty to be drunk or used in agriculture, the worldwide supply of water

needs careful management, especially in agriculture.Although the idea of a water shortage(短缺)seems

strange to someone fortunate enough to live in a high rainfall country, many of the world's agricultural

industries experience constant water shortages.

      Although dams can be built to store water for agricultural use in dry areas and dry seasons, the costs

of water redistribution(重新分配)are very high.Not only is there the cost of the engineering itself, but

there is also an environmental cost to be considered.Where valleys(山谷)are flooded to create dams,

houses are lost and wildlife homes destroyed.Besides, water may flow easily through pipes to fields, but

it cannot be transported from one side of the world to the other.Each country must therefore rely on the

management of its own water to supply its farming requirements.

      This is particularly troubling for countries with agricultural industries in areas dependent on irrigation (灌溉). In Texas, farmers' overuse of irrigation water has resulted in a 25% reduction of the water stores.

In the Central Valley area of southwestern USA, a huge water engineering project provided water for

farming in dry valleys, but much of the water use has been poorly managed.

      Saudi Arabia's attempts to grow wheat in desert areas have seen the pumping of huge quantities of

irrigation water from underground reserves.Because there is no rainfall in these areas, such reserves can

only decrease, and it is believed that fifty years of pumping will see them run dry.

1. From the first two paragraphs we learn that________.

    A. much of the world's water is available for use

    B. people in high rainfall countries feel lucky

    C. the costs of water redistribution should be considered

    D. water can be easily carried through pipes across the world

2. Which of the following is true?

    A. The water stores in Texas have been reduced by 75%.

    B. Most industries in the world suffer from water shortages.

    C. The underground water in Saudi Arabia might run out in 50 years.

    D. Good management of water use resulted from the project in the Central Valley.

3. What is most likely to be discussed in the paragraph that follows?

    A. Steps to improving water use management.

    B. Ways to reduce the costs of building dams.

    C. Measures to deal with worldwide water shortages.

    D. Approaches to handling the pressure on water supply.

4. The text is mainly about________.

    A. water supply and increasing population

    B. water use management and agriculture

    C. water redistribution and wildlife protection

    D. water shortages and environmental protection

2011年3月30日，国务院常务会议决定将每年的（ ）确定为中国旅游日。

NB/T47013.3-2015标准规定，对接焊接接头评定质量等级时，若母材厚度不同，（）

A、取薄板侧厚度值

B、取厚板侧厚度值

C、取板厚平均值

D、以上都不对