题目内容
Have you ever had a case 1. a mistake helped you understand an idea or a skill? For me, it was sailing. I took a sailing class when I was in high school. No matter how many times I read the 2. (explain), I could not understand the difference between a “tack" and a “jibe”---two methods of turning a boat ---one much 3. (safe) than the other. Later, one day, when I was sailing, a heavy wind blew up. We needed to head back, 4. I mistook the “tack” for the “jibe” and pushed the boat in the wrong direction. Before I realized 5. (I) mistake, it was too late. Luckily, no one 6. (hurt). Only after this experience did I 7. (clear) understand the sailing phrase “turning on the wind” that I 8.(read) so many times in the textbook.I never confused a “jibe” with a “tack” again! Now I often share this story 9. my students after they have made mistakes. I hope they can learn something from their mistakes and correct them instead of10. (regret) all day.
名校课堂系列答案Homestay in Sydney, Australia
Linda: Our big home is in Sydney, about 300 meters from Sydney University and 450 meters from the train station. The train ride is about 30 minutes to the CBD. Now we only have a small bedroom for a female student. The cost is $260 per week, which includes all meals when at home and laundering（洗烫）of clothes. E-mail: markalarms@optusnet.com.au |
John: I have a lovely single room for homestay (male, non-smokers only).The apartment is located across the road from a bus station. A sports field is only a two-minute walk away. The room is for both short and long stays, The cost is $220 per week, including breakfast and lunch on weekdays. There is no washing machine at home. Do your own laundry in the apartment block’s facilities. E-mail: ainsley gilkes@yahoo.com.au |
Eric: I live in the northern suburbs of Sydney---quiet for studying and relaxing, yet close to Sydney University & NCELTR & SJBT，The subway station is nearby. All facilities of the house including a living room with a TV can be used. Owners are very open and friendly, and treat students as part of the family. The prices include all meals (breakfast, Lunch and dinner) and cleaning. The fee is $300 per week. E-mail: mineanny@hotmail.com |
Rose: Hi, everyone! I have one room for homestay (girl students only) in a house which is very close to Sydney University (SIBT) & WSU in the northern district of Sydney. There is a bus station across the road. Travel time to the centre of the city is 40 minutes by train. We only have one homestay at a time. Therefore, our family can take good care of you. The fee is $230 per week. We are looking forward to having you in our home. E-mail: cliqi9239@hotmail.com |
1.Four persons wrote these passages so as to_________
A. look for suitable roommates B. search for homestay information
C. book a suitable room in Sydney D. advertise rooms for homestay
2.One person who lives in John’s apartment .
A. can smoke in the apartment
B. can use John’s washing machine to wash clothes
C. has to walk a long way to get to the sports field
D. is provided with breakfast and lunch on weekdays
3.If Peter wants to find a homestay room near Sydney University, he should send an e-mail to .
A. markalarms@optusnet.com.cn B. mineanny@hotmail.com
C. cliqi9239@hotmail.com D. ainslcy_gilkest@yahoo.com.cn
4.A girl who wants a room for between ＄210 and ＄240 per week would most probably contact .
A. Rose B. John
C. Erie D. Linda
Secret codes（密码）keep messages private. Banks, companies, and government agencies use secret codes in doing business, especially when information is sent by computer.People have used secret codes for thousands of years.1.Code breaking never lags（落后）far behind code making. The science of creating and reading coded messages is called cryptography.There are three main types of cryptography.2.For example, the first letters of “My elephant eats too many eels” spell out the hidden message “Meet me.” 3.You might represent each letter with a number, for example. Let’s number the letters of the alphabet, in order, from 1 to 26. If we substitute a number for each letter, the message “Meet me” would read “135520135.”A code uses symbols to replace words, phrases, or sentences. To read the message of a real code, you must have a code book.4.For example, “bridge” might stand for “meet” and “out” might stand for “me.” The message “Bridge out” would actually mean “Meet me.”5.However, it is also hard to keep a code book secret for long. So codes must be changed frequently.
A. It is very hard to break a code without the code book. |
B. In any language, some letters are used more than others. |
C. Only people who know the keyword can read the message. |
D. As long as there have been codes, people have tried to break them. |
E. You can hide a message by having the first letters of each word spell it out. |
F. With a code book, you might write down words that would stand for other words. |
G. Another way to hide a message is to use symbols to stand for specific letters of the alphabet. |
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