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阅读下面短文,从短文后所给各题的四个选项中,选择最佳选项。 October 16 is World Food Day. This day is also the anniversary (纪念日) of the United Nations Food and Agriculture Organization (FAO) (联合国粮农组织). More than 100 countries are holding special events. All of these aim to celebrate the establishment of the FAO in 1945. The theme chosen for this year's World Food Day is 'Water: Source (资源) of Food Security'. A UN report says that over 6 million people have died from hunger and related diseases so far this year alone. More than 850 million people, or about one in seven, around the world do not get enough food, and the need for food will increase as the world's population grows. The UN also reports that by year 2030, the world may need 60% more food. Most of that increase will have to come from agriculture supported by water irrigation (灌溉). However, fresh water is already in short supply in many countries. Jacques Diouf, the director of the FAO, says that there are 20 countries that do not have enough water to produce enough food for their populations. Ten nations use more than 40% of their total fresh water for agriculture. He fears that the problem will only become worse as the need for water by people and by industry grows. So water is one of the most important things in the world today. 1. What Mr. Diouf says shows that he most worries about _______. [     ] A. the future of the FAO B. the short of water C. the overgrowth of population D. the development of the environment 2. The reading above implies (暗示) that _______. [     ] A. fresh water for us is quite enough B. the world's population is getting smaller C. we will need more water to irrigate D. industry is the most important thing today 3. The passage is mainly about _______. [     ] A. how to celebrate World Food Day B. the increase of food in many countries C. the importance of water for food D. the UN Food and Agriculture Organization g
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举一反三
【单选题】GPS 目前所采用的坐标系统,是 。
A.
WGS-72 系
B.
WGS-84 系
C.
西安 80 系
D.
北京 54 系
【判断题】三羧酸循环中的草酰乙酸会因其它物质合成而被消耗,因此为了保证三羧酸循环持续进行,草酰乙酸必须通过其它酶促反应合成得到补充。( )
A.
正确
B.
错误
【简答题】三相同步电机,频率为60Hz,由具有常值同步速度的原动机驱动。电枢绕组初始时开路,调整励磁电压,使电枢机端电压为额定值(标幺值为1p.u.)。当转子直轴与a相磁轴重合,即δ=0°时发生三相对称短路。已知短路电流的波形,前两个周期以及第20、第21个周期的峰值和一段时间后的稳态值由下表给出。 求暂态和次暂态电抗和时间常数。 前两个周期以及第20和第21个周期峰值和稳态峰值 电流峰值,p.u. 5.4...
【多选题】某企业生产子类产品采用分类法进行成本计算,子类产品分为甲、乙、丙三个品种。类内费用分配的方法是原材料按原材料定额费用系数为标准,其它费用按定额工时比例系数为标准。子类完工产品总成本为 480920 元,其中直接材料为 269700 元,直接工资为 96760 元,制造费用为 114460 元。产量及定额资料如下: 产量及定额资料 品名 产量 单位产品原材料费用定额(元) 单位产品工时定额(小时) ...
A.
甲成本为143777
B.
乙成本为222376
C.
丙成本为98000
D.
以上都不对
【多选题】以下关于核心能力的表述,正确的是( )
A.
组织的核心能力是其价值的源泉
B.
核心能力是决定组织长期竞争力的基础
C.
核心能力具有不可替代性
D.
核心能力常被用作进入多种市场的手段
【单选题】GPS目前所采用的坐标系统是( )。
A.
WGS-72系统
B.
WGS-84系统
C.
西安80系统
D.
北京54系统
【单选题】在下列贸易术语中,国际运输由买方负责办理的属于( )
A.
CFRC3 LE HAVRE
B.
FOB SHANGHAI
C.
CIFC5 DAKAR
D.
CFR SINGAPORE
【单选题】下列不具有记忆保持功能的元件是
A.
双气控两位五通方向控制阀
B.
单电控弹簧复位两位三通换向阀
C.
机控弹簧复位两位三通换向阀
D.
手控弹簧复位两位三通换向阀
【单选题】下列不具有记忆保持功能的元件是
A.
单电控弹簧复位两位三通换向阀
B.
机控弹簧复位两位三通换向阀
C.
手控弹簧复位两位三通换向阀
D.
双电控两位五通方向控制阀
【判断题】国际贸易术语 CFR SHANGHAHI 中 SHANGHAI 是指买卖合同双方当事人约定的海上运输货位的装运港。
A.
正确
B.
错误
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