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Directions: In this section, you’ll hear some passages. At the end of each passage, you'll hear some questions. Both the passage and the questions will be spoken only once. After each question, choose the best answer from the four choices marked A, B, C, and D.Questions 1 to 4 are based on the passages you have just heard.1.A . Harmfulness of identity theft.B . Suggestions to avoid identity theft.C . Reasons behind identity theft.D . Importance of preventing identity theft.2.A . To make sure that your credit card has a low limit.B . To only use sites that offer a high level of encryption.C . To only use one credit card.D . To make sure that the items can be safely packaged.3.A . Because it keeps you from getting the loan you want to get.B . Because you will change your mailing address.C . Because a thief will forge your signature and get your information.D . Because we don’t need it anymore.4.A . Have a slot in your front door for the mail to fall through.B . Have a slot in your back door for the mail to fall through.C . Have a post box outside your front door.D . Have a post box outside your back door.Questions 5 to 8 are based on the passages you have just heard.5.A . A young policeman who caught some thieves on the street.B . A young man who helped hijack PCs to collect information.C . A young man who created the most advanced computer program.D . A teenager who stole money from people's bank accounts.6.A . He has been put into prison.B . He has been given a new career.C . He has denied committing any crime.D . He has been discharged by the judge.7.A . Accessing computers for dishonest purposes.B . Interfering with computer systems.C . Designing a virus at middle school.D . Possessing software for committing crime.8.A . He will do some work for the police.B . He will have to pay back $ 31,000.C . He will go back to school to finish his study.D . He will create some anti-virus software.Questions 9 to 12 are based on the passages you have just heard.9.A . The undeveloped public transportation.B . The fact that he was unsociable.C . The high crime rate in his hometown.D . His past record as a criminal.10.A . He wanted to be caught again for robbing.B . He had to get the money to start his own business.C . He envied the barber’s enormous money.D . He lost his credit card.11.A . He was directly caught by the police officers.B . He was heavily attacked by the passersby.C . He didn’t get away and waited for the police to arrest him.D . He moved up the avenue impressively.12.A . Mr. Spears is addicted to robbing.B . Mr. Spears is not sociable in his community.C . The crime rate in New York was high.D . Mr. Spears had no option but to commit crime again to support hisfamily.

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Directions: In this section, you'll hear some long conversations. At the end of each conversation, some questions will be asked. Both the conversation and the questions will be spoken only once. After each question, choose the best answer from the four choices marked A, B, C, and D.Questions 1 to 4 are based on the conversation you have just heard.1A . Funny news of the entertainment industry.B . Application letters.C . A report of a theft.D . A new regulation over online cheating.2A . Talking politely with them.B . Wearing a suit.C . Pleasing them with a sweet tongue.D . Flashing them his ID card.3A . To watch out for strangers.B . To accompany the elderly at home.C . Not to admit anyone unless they have an appointment.D . Never trust people at the first sight.4A . She got injured when climbing the mountain.B . She had her identity stolen.C . Her pension was stolen by the thief.D . She was talking with the stranger.Questions 5 to 8 are based on the conversation you have just heard.5A . Because she is brave enough.B . Because she wanted to let him go.C . Because she was so scared.D . Because she lost her consciousness.6A . The robber was quite weak and wore glasses.B . The robber was medium-sized and wore glasses.C . The robber was very tall and skinny.D . The robber was strong and had ugly red lips.7A . A lipstick.B . A handbag.C . A phone.D . A purse.8A . She will never carry her social security card in her purse anymore.B . She will never walk at night alone.C . She will buy some lipsticks for the thief if he likes.D . She will report the robber if he attacks her again.Questions 9 to 12 are based on the conversation you have just heard.9A . How to crack down on crime.B . How to deal with bullying.C . The importance of taking precautions against bullying.D . The importance of taking precautions against crime.10A . A big guy seized his purse away.B . A big guy robbed him of his packsack.C . A big guy threatened him and took away his pocket money.D . A big guy threatened him and copied his assignments.11A . He should keep it as a secret.B . He should let everyone know it.C . He should resort to his parents to curb the problem.D . He should resort to the teacher to solve the problem.12A . He will cope with it by himself.B . He will tackle it with the help of the teacher.C . He will wait and see.D . He will fight bravely against bullying.

结晶的核心是()

A. 晶粒
B. 晶核
C. 晶浆
D. 母液

结晶过程可分为()。

A. 溶液结晶
B. 熔融结晶
C. 升华结晶
D. 沉淀结晶

结晶方法有()

A. 冷却结晶
B. 蒸发结晶
C. 真空冷却结晶

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