皮皮学,免费搜题
登录
logo - 刷刷题
搜题
【简答题】
第三节:阅读理解(共15小题;每小题2分,满分30分) (A) JIUQUAN, Gansu Province, Sept. 6(Xinhua) ---- China’s manned spacecraft Shenzhou-7 will be launched at an appropriate time between Sept. 25 and 30 from the Jiuquan Satellite Launch Center in northwestern Gansu Province, a spokesman said here on Saturday. The mission will accomplish the first spacewalk by Chinese astronauts. “All the major systems involved in the launching are now in the final preparation. The main tests for the spacecraft, the Long-March II-F rocket, suits for the space walk and a satellite accompanying the fly have also been finished, ” said the spokesman. In addition, the ground control system is fully prepared, including the launch site, the landing site, and the communication for observation and control. When Shenzhou-7 enters its orbit, one of the three taikonauts will conduct a space walk, said Zhao Changxi, a senior scientist with the project, earlier. According to Zhao, cameras would be fixed outside and inside of the ship for live broadcasting of the space walk. While the last mission of Shenzhou-6, with a crew of two, was aimed at several days of manned flight, this time the task might be more stringent as one of its main goals is the space walk. Earlier reports said a crew of six astronauts had been chosen for the mission, with three manning the spacecraft and three substitutes. China successfully put two manned spacecrafts into orbit in 2003 and 2005 respectively, becoming the third country to send an astronaut into space after the United States and the former Soviet Union(now Russia). 56. What is the main idea of the passage? A. Shenzhou-7 is better equipped than the last two spaceships. B. Shenzhou-7 will be more successful than the last two launches. C. All the systems involved in the launching have been prepared. D. China is ready for the launching of Shenzhou-7. 57. We can learn from the passage ________. A. This will be the third time for Chinese astronauts to have a space walk B. Three of the six astronauts chosen for the mission will walk in space C. The space walk will be live broadcasted on TV D. Everything has been prepared except communication system 58. The underlined word”stringent”most probably means A. challenging   B. encouraging   C. interesting   D. moving
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案:
举一反三
【单选题】与双端间接式直流变换电路相比,单端间接式直流变换电路的优势是()。
A.
高频变压器铁芯中的磁通只工作在磁化曲线的第1象限
B.
使用的开关管较少
C.
变压器利用率低
D.
控制电路复杂
【多选题】关于前馈控制的应用场合,说法正确的有
A.
主要干扰是可控而不可测的变量。
B.
干扰幅值大而频繁,对被控变量影响剧烈,仅采用反馈控制达不到要求的对象。
C.
当对象的控制通道滞后大,反馈控制不及时,控制质量差,可采用前馈或前馈-反馈控制系统,以提高控制质量。
D.
热交换器是应用前馈控制较多的场合,换热器有滞后大、时间常数大、反应慢的特性,前馈控制就是针对这种对象特性设计的,故能很好发挥作用。
【判断题】大型、精密仪器的创制、分析技术的发展和计算机的发明应用,使物理实验在精密、快速和自动化方面都达到新水平是现代物理学时期的研究方法中的一个特点
A.
正确
B.
错误
【单选题】通用变频器的控制对象是:
A.
伺服电机
B.
感应电机
C.
直流电机
D.
专用电机
【单选题】______ travel round the world alone shows that he is full of courage.
A.
His deciding of
B.
He decides
C.
His decide
D.
His deciding to
【单选题】— His passport shows that he ________Canada. — Yes. He went there on business in spring and autumn last year.
A.
has gone in
B.
has gone to
C.
has been in
D.
has been to
【简答题】(14分)近年来,我闽许多地区气候异常现象频发,如:云南持续几个月的干旱、北方频发的沙尘暴等,使环境问题再次成为公众的焦点 是对环境影响较大的儿种气体,对它们的合理控制和治理是优化我们生存环境的有效途径。 (1)下列做法中,有利于降低大气中的 浓度的有__________ (选填字母)。 a.   直接用煤做燃料 b.  开私家车 c.   棺树造林以增加绿化面积 d.  研究、幵发太阳能使之走进...
【简答题】If a Brazilian puts his thumb and index (食指) into a circle, it shows that he ________ you. [A] will be friends with [B] is not satisfied with [C] is willing to help [D] is satisfied with
【单选题】________he is ,he seldom shows his precious coins to others.
A.
Coin -collector as   
B.
As a coin –collector   
C.
A coin- collector as  
D.
Coin- collector that
【单选题】The smile on his face shows that he is ______ his students' work.
A.
worded about
B.
pleased with
C.
sorry for
相关题目:
参考解析:
知识点:
题目纠错 0
发布
创建自己的小题库 - 刷刷题