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【简答题】
There are many special hotels around the world. In Greenland, there is a hotel made out of ice. In Turkey, there is a cave hotel. And in Bolivia, there is the Salt Palace Hotel. Thousands of years ago, the area around the Salt Palace Hotel was a large lake. But over time, all the water disappeared. Today, the area has only two small lakes and two salt deserts. In the early 1990s, a man named Juan Quesada built the hotel. He cut big blocks of salt from the desert and used the blocks to build it. Everything in the hotel is made out of salt: the walls, the roof, the tables, the chairs and the beds. The sun heats the walls and roof during the day. So the rooms stay warm at night, though it’s cold outside in the desert. The hotel has twelve rooms. A single room costs $40 a night, and a double room $60. A sign on the hotel’s wall tells guests, “Please don’t lick (舔) the walls.” 小题1:Where did the salt for the hotel come from? A.A cave. B.The lake. C.The salt desert. D.A salt field. 小题2:What keeps the rooms in the Salt Palace Hotel warm at night? A.The water in the lake. B.The sand in the desert. C.The furniture in the rooms. D.The heat from the walls and roof. 小题3:What is the passage mainly about? A.A large lake. B.A special hotel. C.A beautiful wall. D.A famous desert.
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【简答题】你最喜欢哪一个品牌的什么类型相机?为什么?
【单选题】用酸性氢氧燃料电池为电源进行电解的实验装置示意图如图所示。下列说法中,正确的是 [     ]
A.
燃料电池工作时,正极反应为:O 2 +2H 2 O+4e - =4OH -
B.
a极是铁,b极是铜时,b极逐渐溶解,a极上有铜析出
C.
a极是粗铜,b极是纯铜时,a极逐渐溶解,b极上有铜析出
D.
a、b两极均是石墨时,在相同条件下a极产生的气体与电池中消耗的H 2 体积相等
【简答题】闭区间上连续函数一定有最值,就是( )和( ) 开区间或者实际问题中求最值的话,只能求一个最值,那么在区间中只能有( )个极值点。
【单选题】用酸性氢氧燃料电池为电源进行电解的实验装置示意图如下图所示。下列说法中,正确的是 [     ]
A.
燃料电池工作时,正极反应为:O 2 + 2H 2 O + 4e - = 4OH -
B.
a极是铁,b极是铜时,b极逐渐溶解,a极上有铜析出
C.
a极是粗铜,b极是纯铜时,a极逐渐溶解,b极上有铜析出
D.
a、b两极均是石墨时,在相同条件下a极产生的气体与电池中消耗的H 2 体积相等
【简答题】什么是燃料电池?试述其工作原理。
【判断题】环境的自净是有一定限度的,超过此限度或环境条件改变,都会停止自净,造成环境污染,甚至破坏生态平衡,引起公害。
A.
正确
B.
错误
【单选题】上市公司所属企业申请境外上市,上市公司及所属企业董事、高级管理人员及其关联人员持有所属企业的股份,不得超过所属企业到境外上市前总股本的( )。
A.
5%
B.
10%
C.
15%
D.
20%
【单选题】如图为用酸性氢氧燃料电池为电源进行电解的实验装置示意图。下列说法中,正确的是
A.
燃料电池工作时,正极反应为:O 2 + 4H + + 4e - = 2H 2 O
B.
a极是铁,b极是铜时,b极逐渐溶解,a极上有铜析出
C.
a极是含锌、铁的粗铜,b极是纯铜, a极溶解铜的质量与b极析出铜的质量相等
D.
a、b两极均是石墨时,在相同条件下a极产生的气体与电池中消耗的H 2 体积相等
【简答题】平面运动简化为 在 内的运动
【单选题】Teach the sports game you want to teach.
A.
Kenya
B.
Honduras
C.
Morocco
D.
Ghana
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