某建设项目占地面积为50000m2，土地产值为1200000万元，项目所在地的城市土

（1）细绳和竖直平面的夹角是多少？（2）斜面对球的支持力？

“Global warming could make humans shorter,” warn scientists who claim to have found evidence that it caused the world's first horses to shrink(收缩) nearly 50 million years ago. In fact, a team from the universities of Florida and Nebraska says it has found a link between the Earth heating up and the size of mammals – horses, in this case.

The scientists used fossils to follow the evolution of horses from their earliest appearance 56 million years ago. As temperature went up，their size went down, and vice versa（反之亦然）;“ At one point they were as small as a house cat,” said Dr Jonathan Bloch, curator（博物馆长） of the Florida Museum of Natural History, which was quoted by the "Daily Mail" as saying.

The scientists say that the current warming could have the same effect on mammals and could even make humans smaller."Horses started out small, about the size of a small dog . What's surprising is that after they first appeared, they then became even smaller and then dramatically increased in size, and that exactly corresponds to the global warming event, followed by cooling”

"It had been known that mammals were small during that time and that it was warm, but we hadn't realized that temperature specifically was driving the evolution of body size," Dr Bloch said in the "Science" journal.

小题1:How did scientists find out the horses’ earliest appearance millions of years ago?

A．searching the data on the net

B．sorting through the pictures of ancient times

C．using fossils to follow the evolution

D．analyzing the related images小题2:What can we infer form the passage?

A．As temperatures went up, horses dramatically increased in size

B．The temperature has no effect on mammals’ evolution

C．As temperatures went up, horses’ size went down

D．In history, it used to be warm at early times , followed by a certain period of sharply cooling down.小题3:Which is the most closest meaning to the underlined words most probably mean _______.

A．react to

B． be contradictory to

C．be consistent with

D． differ from小题4:What is the best title of the passage?

A．Global warming is to disappear

B．The temperature on earth is to decrease

C．Global warming makes human shorter

D．Mammals are dying out.

Clean Ltd was established some five years ago to manufacture industrial solvents and cleaning solutions, and Des was appointed managing director.The company’s main contract was with Dank plc a large industrial conglomerate.In the course of its research activity, Clean Ltd’s scientists developed a new super glue. Des was very keen to pursue the manufacture of the glue but the board of directors overruled him and decided that the company should stick to its core business.The managing director of Dank plc is a friend of Des’s and has told him that Dank plc will not be renewing its contract with Clean Ltd as he is not happy with its performance. He also told Des that he would be happy to continue to deal with him, if only he was not linked to Clean Ltd.Following that discussion Des resigned from his position as managing director of Clean Ltd and set up his own company, Flush Ltd which later entered into a contract with Dank plc to replace Clean Ltd. Flush Ltd also manufactures the new glue discovered by Clean Ltd’s scientists, which has proved to be very profitable.Required:In the context of company law, advise the board of Clean Ltd as to whether they can take any action against Des or Flush Ltd. (10 marks)

在有n个结点的二叉树的llink-rlink法存储表示中，n个结点所含有的2n个指针中，必有【 】个为空指针。

阿司匹林性质不稳定的主要原因是( )。

A．水解

B．聚合

C．还原

D．氧化

E．挥发