施工现场消防安全管理制度应包括的内容有（）。 A.消防安全人员的招聘制度 B.消防安

2012年9月1日，一个令我终生难忘的日子。在这个阳光明媚的日子里，我们走进了中学，我们是那么的兴奋：！”，这里面透着的是一份自尊和自信。但面对新的校园、新的老师和同学，学着新的科目，我又感到有些不适应：这么多的功课我都能学好吗？我能交到新朋友吗？……请运用课本有关知识回答下列问题

（1）在一个新的集体里，怎样相处才能成为好朋友？

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（2）在新的环境里，我们应怎样适应学校的生活？

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如图，草原上的部分生物示意图，据图回答：

（1）在生态系统的组成上，草和各种动物分别属于______．

（2）要保持草原生态系统的平衡，你认为植物、草食动物、肉食动物之间的数量关系应是______．

（3）为了防止鸟吃草籽，有人把人工种草的试验区用网子罩起来，过一段时间发现，草的叶子几乎被虫子吃光了，而未加罩网的天然草原，牧草却生长良好，这个实例说明______．

下列有关人体稳态的叙述不正确的是[ ]

A．下丘脑既能传导神经冲动，又有分泌激素的功能

B．渴觉中枢兴奋，则下丘脑分泌抗利尿激素量增加

C．胰岛素是唯一降低血糖的激素

D．体温调节中枢位于大脑皮层

Did you ever wonder how some of your favorite foods, products or toys came about? Believe it or not, they may have been an accident, or a failure of some other intention. Below, we found three mistakes we’re thankful for turned out to be what they are.

1. Most historians hold that the Chinese invented fireworks in the 9th century when they

discovered how to make gunpowder. Story has it that a Chinese cook accidentally mixed together what were then considered common kitchen items and noticed they burnt. When put tightly in a bamboo tube and lit, it blew up.

2. In May of 1886, a law led John Pemberton, a pharmacist（药剂师）, to rewrite the formula(配方) for "Pemberton’s French Wine Coca,” his popular headache treatment. Containing sugar instead of wine as a sweetener, the outcome became something for Coke, which was later mixed with carbonated water. His bookkeeper suggested the name Coca-Cola because he thought the two C’s would look good together, which is how what we call Coca-Cola, a world –wide drink came into being.

3. During World War II, scientists at the University of Birmingham invented the magnetron—an important heat-producing part of the microwave oven(微波炉). While working for Raytheon Corporation after the war, the American engineer Percy Spencer was testing the magnetron when a chocolate bar in his pocket melted. He went on to test other foods including popcorn kernels, and found it to be a much more efficient way to cook. In 1947 Raytheon came out with the first restaurant microwave oven, which was six feet tall and weighed 750 lbs.   

小题1:The right time order of the three inventions, according to the passage, should be_________.

A．fireworks, the microwave and Coca-Cola

B．fireworks ,Coca-Cola and the microwave

C．Coca-Cola , fireworks and the microwave

D．the microwave, Coca-Cola and fireworks小题2:Percy Spencer found the microwave efficient in cooking when he was _______.

A．looking for a way to melt his chocolate

B．trying to know how a magnetron could cook

C．working to know how the magnetron works

D．asked to invent a restaurant microwave oven小题3:What can we learn from the above invention stories? 

A．Experiments make great inventors of our time.

B．Nothing is impossible if one tries each day.

C．Inventors come out of hard work at any time.

D．A small incident may lead to a great invention.小题4:What’s the best title for the passage?

A．What great inventions they are!

B．Inventions from Three Countries.

C．Stories of Accidental Inventions.

D．The Human Inventions of time.

整流器ZXD1800 75A输出限流值在3～82.5A连续可调，限流至（）V以下回扫闭锁。

A、8

B、10

C、15

D、18