When a student has some ideas in his mind and he must ignore some irrelevant parts when reading, which of the following strategies can be used?

A . ALTER TABLE students ADD PRIMARY KEY student_id; B . ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student _ id); C . ALTER TABLE students ADD CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id); D . ALTER TABLE students MODIFY CONSTRAINT stud _ id _pk PRIMARY KEY (student _ id)

A . An error is returned. B . You are prompted to enter a new value. C . A report is produced that matches the first report produced. D . You are asked whether you want a new value or if you want to run the report based on the previous value.

A . 正确 B . 错误

A . An error is returned. B . You are prompted to enter a new value. C . A report is produced that matches the first report produced. D . You are asked whether you want a new value or if you want to run the report based on the previous value.

A . fibers are terminated incorrectly on a node B . the channel number in the received K1 byte is not identical to the channel number transmitted in the K2 byte C . the channel number in the received C1 byte is not identical to the channel number transmitted in the C2 byte D . the channel number in the received C2 byte is not identical to the channel number transmitted in the C1 byte E . the channel number in the received K2 byte is not identical to the channel number transmitted in the K1 byte

A . SELECT MAX (gpa) FROM student _ grades WHERE gpa IS NOT NULL; B . SELECT (gpa) FROM student _ grades GROUP BY semester_end WHERE gpa IS NOT NULL; C . SELECT MAX (gpa) FROM student _ grades WHERE gpa IS NOT NULL GROUP BY semester_end; D . SELECT MAX (gpa) GROUP BY semester_end WHERE gpa IS NOT NULL FROM student _ grades; E . SELECT MAX (gpa) FROM student _ grades GROUP BY semester_end WHERE gpa IS NOT NULL

A . ALTER TABLE students ADD PRIMARY KEY _ id; B . ALTER TABLE students ADD CONSTRAINT PRIMARY KEY (student_id); C . ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY student_id; D . ALTER TABLE students ADD CONSTRAINT stud_id_pk PRIMARY KEY (student_id); E . ALTER TABLE students MODIFY CONSTRAINT stud_id_pk PRIMARY KEY (student_id)

A.Which do you perfer B.Oh,no.That&39;s OK C.How do you like it D.Would you like to try it on

The (anti-smoking) campaign (on campus) has made (quite an impact) (with) the students. A．anti-smoking B．on campus C．quite an impact D．with

A．Y B．N C．NG

In December 1987，the Twiglet Bank was opened at an Elementary School in Miami,Florida. It is a real bank that accepts money for savings and makes loans, and it is operated by students between 10 and 12 years old. The bank is open for one hour two days a week.Students can put their money into the bank and withdraw it as they wish. Officials from a local bank helped the students start the bank. They trained twenty-three of ther to do all the different kinds of bank jobs, from counting money to guarding the bank. The students needed money to start the bank. They raised more than $ 2,000 by selling 50-dollar shares in the bank to parents, teachers, the local bank workers, and customers. Organizing and operating the bank has taught the children a lot about the banking business. They have learned about raising and investigating money and how to use computers and other banking equipment. They have also learned how to ask for a job and to be responsible for their jobs. 1.Who operated Twiglet Bank？ A.The teenagers B.The community C.The government 2.Who helped these children start a bank？ A.Parents B.Teachers C.Bank officials 3.How did children raise money for their bank？ A.Their schools provided financial support for them B.They found an organization to donate a set of fund C.They sold shares in the bank to parents, teachers, etc 4. Which is NOT true for the benefits of children from operating their own bank？ A. They learned how to produce the money B. They learned how to look for a job and do it well C. They learned how to use computers and banking equipment 5. What is the best title for this passage？ A. A bank of Miami B. A Student Bank C. The Operation of American Bank

A．They kept parts of the old edition. B．They switched entirely to a new book. C．They kept away from any new book. D．They bought the new book at a discount.

◇ Search the Internet for reputable（声誉好的）services. Look for reviews of such sites to learn more about others student’experiences. Don’t join a service until you have done research. ◇ Check to see if you can use a nickname, instead of your real name, to protect your number and birthday. ◇ Stop contact with others if you feel uncomfortable with the topics of the conversation. ◇ Try to use the language you are studying when communicating with others. Asking appropriate questions will also help you learn about other cultures. Remember: To understand a whole culture, you have to talk to many people. 66.Finding friends online may help students______ their language skills and learn more about new cultures. Before you join an Internet service, you have to ______. Giving ______ information to anyone online could be dangerous. To protect your identity online, you’d better not use your ______. Talking to many people is necessary for one to understand a whole ______. 请帮忙给出每个问题的正确答案和分析，谢谢！

A．relevant to B．related with C．associated with D．associated to

A、skimming B、scanning C、extensive reading D、intensive reading

A．issue B．assignment C．seminar D．aware