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【简答题】
阅读理解. When final exams draw near, you'll have class rankings (排名) again. Who will come top? Last week the Organization for Economic Cooperation and Development (经济合作与发展组织) picked the best students in the world. They are Finnish (芬兰的). The OECD gave a test to 280,000 10-year-old students from more than 40 countries and regions (地区), last year. The OECD wanted to know how well students were doing at school. Finnish students were No.1 in the reading tests, and second in math after Hong Kong. Both Japan and Finland were top in science. In problem solving Finnish students came second to South Korea. The test also showed Finland has more top students than the other countries. Finns of your age have done a really good job. But don't get jealous. You can learn from them. Most Finnish students make good use of the Inter-net. Of course not for computer games, but for doing more exercises and finding out more information. Libraries are also important. Finland spends a lot of money on them. Many students have a free card. They read for at least one or two hours a day. 1. Students from _____ did best in general in the test. A. South Korea B. Finland C. Hong Kong D. Japan 2. Which country did better than Finland in problem solving? A. Japan. B. China. C. South Korea. D. Britain. 3. What can we learn from Finnish students? A. Play more computer games on the Internet. B. Spend lots of time in libraries. C. Read storybooks for at least one or two hours a day. D. Do more exercises 4. We can infer from the passage that _____. A. the test can make students lose their interest in learning B. the test is designed to find out good ways to use the Internet C. it's hard to tell who are the best students in the world D. good habits are key to learning 5. The best title for this passage is _____. A. Ways to Improve Reading Skills B. Test Finds World's Best Students C. Finnish Students D. Internet and Libraries
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参考答案:
举一反三
【单选题】001230是4舍5入得到的近似值,它有( )位有效数字。
A.
3
B.
4
C.
5
D.
6
【简答题】点灯状态下,出站信号机一个绿色灯光表示准许列车由车站以()闭塞方式出发,表示运行前方()区间空闲。
【多选题】从AB端口看,下图所示三个电路互为等效,则【图片】
A.
Uoc=12V , Ro=3 Ω
B.
Isc= 4 A, Ro= 3 Ω
C.
Uoc=12V, Ro=2 Ω
D.
Isc= 4 A, Ro= 2 Ω
E.
Uoc=8V, Ro=2 Ω
F.
Uoc=-12V, Ro=2 Ω
G.
Isc=- 4 A, Ro= 2 Ω
【判断题】一个绿色灯光表示准许列车由车站以站间闭塞方式出发,前方站间空闲。
A.
正确
B.
错误
【多选题】从AB端口看,下图所示三个电路互为等效,则【图片】
A.
Uoc= 1 V, Ro= 0.5 Ω
B.
Isc= 2 A, Ro= 0.5 Ω
C.
Uoc= 2 V, Ro= 1 Ω
D.
Isc= 2 A, Ro= 1 Ω
E.
Uoc= 1 V, Ro= 1 Ω
F.
Isc= 2 A, Ro= 1 Ω
G.
Uoc= 1 V, Ro= 2 Ω
H.
Isc= 2 A, Ro= 2Ω
【单选题】下列哪个文件的内容为当前已挂载文件系统的列表?
A.
/etc/inittab
B.
/etc/profile
C.
/etc/mtab
D.
/etc/fstab
【单选题】-0.001230是四舍五入得到的近似值,它有( )位有效数字。
A.
3
B.
4
C.
5
D.
6
【单选题】直流电机改善换向、 减小火花最好采用的是( )。
A.
(A)选用合适电刷
B.
(B)适当移动电刷位置
C.
(C)增设换向极和补偿绕组
D.
(D)调整电刷的弹簧压力
【单选题】covalent bond
A.
配位键
B.
共价键
C.
离子键
D.
氢键
【多选题】从AB端口看,下图所示三个电路互为等效,则【图片】
A.
Uoc= 4 V, Ro= 1 Ω
B.
Isc= 4 A, Ro= 1 Ω
C.
Uoc= 2 V, Ro= 1 Ω
D.
Isc= 2 A, Ro= 1 Ω
E.
Isc= 10 A, Ro= 2 Ω
F.
Uoc= 20 V, Ro= 2 Ω
G.
Isc= 10 A, Ro= 1 Ω
H.
Uoc= 20 V, Ro= 1 Ω
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