[不定项选择题]If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet.By the middle of the 21st century,if present trends continue, we will have used up all the oil that drives our cars,for example.Even if scientists develop new ways of feeding the human race,the crowded conditions on earth will make it necessary for lus to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however,has recently been suggested by American scientist, Professor Carl Sagan. Sagan believes that before the earth's resources are compleetely exhausted it will be possible to change the atmophere of Venus and so create a new world almost as large as earth itself. The difficult is that Venus is much hotter than the earth and there is only a tiny amount of water there. Sagan proposes that algae organisms that can live in extremely hot or cold atmospheres and at the same time produce oxygen,should be bred in condition similar to those on Venus.As soon as this has been done, the algae will be placed in small rockets. Spaceship will then fly to Venus and fire the rockets into the atmosphere .In a fairly short time, the alge will break down the carbon dioxide into oxygen and carbon. When the algae have done theri work, the atmosphere will become cooler,but befor man can set foot on Venus it will be neccessary for the oxygen to produce rain. The surface of the planet will still be too hot for man to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus. On Venus there is a lot of ________.
A.a.water
B.b.carbon dioxide
C.c.carbon monoxide
D.d.oxygen

[不定项选择题]If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet.By the middle of the 21st century,if present trends continue, we will have used up all the oil that drives our cars,for example.Even if scientists develop new ways of feeding the human race,the crowded conditions on earth will make it necessary for lus to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however,has recently been suggested by American scientist, Professor Carl Sagan. Sagan believes that before the earth's resources are compleetely exhausted it will be possible to change the atmophere of Venus and so create a new world almost as large as earth itself. The difficult is that Venus is much hotter than the earth and there is only a tiny amount of water there. Sagan proposes that algae organisms that can live in extremely hot or cold atmospheres and at the same time produce oxygen,should be bred in condition similar to those on Venus.As soon as this has been done, the algae will be placed in small rockets. Spaceship will then fly to Venus and fire the rockets into the atmosphere .In a fairly short time, the alge will break down the carbon dioxide into oxygen and carbon. When the algae have done theri work, the atmosphere will become cooler,but befor man can set foot on Venus it will be neccessary for the oxygen to produce rain. The surface of the planet will still be too hot for man to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus. Man can land on Venus only when_______.
A.a.the algae have done their work
B.b.the atmosphere becomes cooler
C.c.thereis oxygen
D.d.it rains there

[不定项选择题]1Excelon Travel Service, Inc 711 Market Street San Francisco, California 94102 Dear Mr. Miza: Thank you for giving Excelon Travel Services the opportunity to arrange your family ' s vacation travel plans. As an additional service to you, we have provided an overview of your travel and hotel arrangements （all times are local）: Which of the following aspect is not described for the person in the old picture that the author' s daughter showed to him?
A.figure
B.skin
C.age
D.hair

[不定项选择题]不定项8、大气预测模型AERMOD和CALPUFP均需输入的参数有()。
A.土地利用类型
B.污染源参数
C.高空气象数据
D.地形参数

[不定项选择题]共用题干 A焦化厂为民营企业，从业人员1000人，2009年发生生产安全事故2起、造成2人轻伤。该厂因精苯工业废水兑水稀释后外排，被环保部门责令整改。该厂采取的整改措施是将废水向煤堆喷洒，这样既抑制了扬尘，又避免了废水外排。为防止相关事故发生，该厂于2009年5月20日制定实施了《A焦化厂精苯污水喷洒防尘管理办法》。2011年5月11日15时20分许，A厂备煤工甲、乙在进行胶带输送机巡检作业时闻到强烈异味，随后两人分别前往不同部位查找原因。15时38分，乙听到从甲的方向传来一声闷响，气浪迎面扑来，发现通廊部分坍塌。乙立即呼救。厂领导接到报告后，迅速组织对胶带输送机通廊坍塌现场进行搜救，在胶带输送机通廊北端发现甲倒在废墟中。甲头部有明显外伤，身上大面积烧伤，经医务人员确认已经死亡。事故调查确认，此次事故为1号煤仓内苯蒸气爆炸事故。在含苯废水向煤场内煤堆喷洒1年后，废水管道断裂，废水从管道断裂处流入煤堆底部，经胶带输送机运输，大量含苯煤粉进入1号煤仓，从含苯煤粉中挥发出的低浓度苯蒸气积累、聚集达到爆炸极限，遇到点火源后引起爆炸。
根据以上场景，回答下列问题（共14分，每题2分，1～3题为单选题，4～7题为多选题）： A厂2009年度百万工时伤害率为()
A.1
B.2
C.3
D.4
E.5