【名词&注释】
同分异构体(isomer)、化学变化(chemical change)、重新分配(reparcelling)、标准状况(standard condition)、核外电子排布(arrangement of extranuclear electrons)、营养繁殖体
[单选题]西瓜的食用部分与( )的果实一样，均由发达的胎座发育而来。
A. 南瓜
B. 柑橘
C. 黄瓜
D. 番茄
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举一反三：
[多选题]下述属于地衣体营养繁殖体的是( )。
A. 小裂片
B. 粉孢子
C. 粉芽
D. 珊瑚芽
[单选题]
A. practised
B. wandered
C. studied
D. stayed
[单选题]34______
A. realized
B. hoped
C. agreed
D. insisted
[多选题]下列植物中，属于子囊菌亚门的有( )。
A. 根霉
B. 酵母
C. 伞菌
D. 羊肚菌
[单选题]EThe 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 rainfull country, many of the world’s agricultural industries experience constant water shortages.
A. Although dams can be built to store water for agricultural use in dry areas and dry seaons, the costs of water redistribution(重新分配)are very high. Notonly 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 many 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.
B. This is particularly troubling ro countries with agricultural industries in areas dependent on irrigation（灌溉）. In Texas, farmers’ overuse of irrigation water be resulted in a 25% redcution of the water stores. In the Central Valley area of south eastern USA, a huge water engineering project provided water for farming in dry vallege, but much of the water use has been poorly managed.
C. Saudi Arabia’s attempts to grow wheat in desert areas have been 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.
D. 72. From the first two paragraphs we learnt that _______.
E. much of the world’s water is available for use
F. people in high rainfll countries feel lucky
G. the costs of water redistribution should be considered
H. water can be easily carried through pipes across the world
[单选题]15O和14O是氧元素的两种核素，NA表示阿伏加德罗常数。下列说法正确的是
A. 15O2和18O2互为同分异构体
B. 16O和18O核外电子排布(arrangement of extranuclear electrons)方式不同
C. 通过化学变化可以实现16O与18O间的相互转化
D. 标准状况下，1.12L16O2和1.12L18O2均含0.1NA个氧原子
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