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
【简答题】离子交换法的运行操作一般包括_______、_______、______和_______ 4 个步骤。
【判断题】图示体系中,链杆 1 和链杆 2 的交点 O 可视为虚铰(瞬铰)。
A.
正确
B.
错误
【单选题】Br2(g) + 2NO(g) =2NOBr(g),对Br2为一级反应,对NO为二级反应,若反应物浓度均为2mol·L-1时,反应速度为3.25×10-3mol·L-1·s-1,则此时的反应速度常数为()L2·mol-2·s-1。
A.
2.10 × 102
B.
3.25 × 10-3
C.
4.06 × 10-4
D.
3.12 × 10-7
【单选题】将固体NH 4 Br置于密闭容器中,在某温度发生下列可逆反应:NH 4 Br(s) NH 3 (g)+HBr(g)2HBr(g) Br 2 (g)+H 2 (g).2min后,测得c(H 2 )=0.5mol/L,c(HBr)=4mol/L,若上述反应速率用v(NH 3 )表示,下列反应速率正确的是(  )
A.
0.5mol/(L?min)
B.
2.5mol/(L?min)
C.
2mol/(L?min)
D.
5mol/(L?min)
【单选题】Br 2 (g)+2NO(g)= 2NOBr(g),对Br 2 为一级反应,对NO为二级反应,若反应浓度均为2 mol·L -1 时,反应速率为3.25mol·L -1 ·s -1 ,则此反应的反应速率常数为
A.
2.10×10 2
B.
3.26
C.
4.06×10 -4
D.
3.12×10 -7
【单选题】将固体NH 4 Br置于密闭容器中,在某温度下,发生下列可逆反应: NH 4 Br(s) NH 3 (g)+HBr(g)  2HBr(g) Br 2 (g)+H 2 (g) 。2min后,测得c(H 2 )=0.5mol/L,c(HBr)=4mol/L,若上述反应速率用 (NH 3 )表示,下列反应速率正确的是
A.
0.5mol/(L·min)
B.
2.5 mol/(L·min)
C.
2 mol/(L·min)
D.
5 mol/(L·min)
【多选题】团蟾酥和片蟾酥的区别包括( )
A.
收集的模具不同 B、外表颜色不同
B.
断面颜色不同 D、产地不同
【判断题】图示体系中,链杆1和链杆2延长线的交点可以视为一个虚铰。
A.
正确
B.
错误
【简答题】(10分).在200℃时,将a mol H 2 (g)和b  mol Br 2 (g)充入到体积为1 L的密闭容器中,发生反应:Br 2 (g)+H 2 (g) 2HBr(g)。 (1)反应刚开始时,由于c(H 2 )=________________,而c(HBr)=______,所以v 正 最大,而v 逆 最小为零; (2)随着反应的进行,反应混合物中各组分浓度的变化趋势为c(Br 2 )__...
【判断题】市场调查需要遵守一定的程序,不可无序进行。 ( )
A.
正确
B.
错误
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