修正海平面气压多报10hPa，飞机降落时会发生什么后果？

第二部分阅读理解（共25小题。第一节每小题2分，第二节每小题1分；满分45分）

阅读下例短文，从每题所给的四个选项中，选出最佳选项（共20小题；每小题2分，满分40分）

Once a group of 17-year-old schoolboys decided to break the world basketball marathon（马拉松）record. They wanted to play for 90 hours and add 6 hours to the record. Each team had 9 players, with 5 at a time. The boys decided each person would play 21.5 hours and then rest for 2 hours. Then they started at 6 o’clock in the evening.

The first night was very hard for the players. When it was their turn to rest, they were too excited to fall asleep at once. After sleeping for a short time, they had to play again. On the second night,they fell asleep as soon as they stopped, Some of them had trouble with their feet and hands, but the only serious problem was a psychological（心理学的）one. Each boy was thinking: Why am I doing this? How can I play any longer? After the third night, the players knew they could finish the 90 hours. The basketball on the fourth night was very slow. But in the final hours, the players got better. For the last few minutes, the players looked as fresh as when they started. How happy everyone was!

41．Before this basketball marathon, the world record was       .

A．84 hours   B．86 hours   C．90 hours   D．96 hours

42．The first night was hard for the players because_______.

A．they were too excited      B．they only slept for a short time

C．no one watched them play      D．it was very long

43．“…the players looked as fresh as when they started.”Here “fresh”means_______.

A．不熟练的 B．兴奋不己的     C．精神饱满的     D．伤痕累累的

44．Which of the following is not true.

A．Some of the boys were hurt when they played

B．It was hard for the players to fall asleep at night

C．The boys started playing at 6 o’clock in the evening

D．In the end, all the boys felt happy

根据所给信息写出化学反应方程式．

（1）燃烧很旺的煤炉泼上水后，火苗往往窜得很高，这是因为碳和水在高温条件下生成两种具有可燃性的气体：______．

（2）剧烈运动后，人的血液中会产生较多的乳酸（C₃H₆O₃），使人肌肉酸痛．一段时间后，乳酸与吸入的氧气反应生成二氧化碳和水，肌肉酸痛消失：______．

（3）一些豆科植物能将空气中的氮气转化成能被作物吸收的氮的化合物，其反应可看作是氮气、碳、水在根瘤菌的催化作用下生成了氨气和二氧化碳：______．

（4）硅烷（SiH₄）和甲烷一样，都是无色、无味、具有可燃性的气体，且硅的化学性质与碳相似，在某些化合物中硅原子可以代替碳原子．写出硅烷燃烧的化学方程式：______．

自招标文件或者资格预审文件出售之日起至停止出售之日止，最短不少于（）个工作日。

A．5．

B．7

C．10

D．15

下列细菌不形成芽胞的是（）

A．破伤风梭菌

B．白喉棒状杆菌

C．炭疽杆菌

D．肉毒梭菌

E．枯草杆菌

离心泵采用蜗牛形泵壳，叶轮上叶片弯曲方向与叶轮旋转方向相反。试定性解释以上两部件采用此种结构的理由。