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任意一个周期函数都存在最小正周期.
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Complete the following paragraph with the correct form of the words and expressions given below:certainly however in other words it's true thaton the other handthe fact isthenthereforethis being the casewhileAre criminals born or made? (1)___________, is it the environment that creates criminals or is criminality due to one's genetic make-up? (2)_____________ there is scientific evidence that there are genes that make a person more likely to be aggressive, and (3)_____________, if your parents have been in trouble with the law, you are more likely to get into the same kind of trouble. （4)_____________, this is by no means the whole story. (5)__________ a child may have this gene, as long as they are brought up in a loving environment where they are not smacked or physically punished by their parents, they are unlikely to become criminals. (6)___________________, if a child is born into a family that has a history of violent criminal behaviour, (7)____________ it is very probable that the child will be influenced by this and become a criminal himself. (8)________________________, it is very difficult for a child born into such an enviornment to escape its influence without some kind of encouragement from outside. (9)_________________________, education becomes an all-important factor, since, if a child can leave school with reasonable qualifications, they can obtain a job that pays reasonably well. (10)_____________, there will be far less motivation to turn to crime, since lack of money is one of the main causes of criminal behaviour.
Reading and understandingChoose the best way to complete the sentences.1 The man in the doorway explains why he’s waiting because ______.A.he knows he looks suspicious to the policemanB.he loves telling the story of his years in the WestC.he mistakes the policeman for his friendD.he wants to know what happened to the restaurant2 The man and his friend decided to meet again in twenty years in order to ______.A.compare life in New York with life in the WestB.discover how their lives had turned outC.be sure that they didn’t lose touchD.have dinner again in the restaurant3 The man is confident that as long as Jimmy is still alive, ______.A.he will have done better than JimmyB.he will try to make Jimmy leave New YorkC.Jimmy will turn up on the date and at the time they had agreedD.the policeman will be on his way4 When the tall man turns up, Bob ______.A.isn’t sure at first if it’s JimmyB.suggests they go back to the restaurant for dinnerC.realizes he’s at least two inches taller than JimmyD.doesn’t recognize him5 The tall man has arrested Bob because ______.A.Jimmy was in fact the first policemanB.the first policeman wasn’t wearing plain clothesC.he had a note from Jimmy to BobD.Bob is wanted by the police in Chicago
After Twenty Years, a 1_________ written by O. Henry, is famous for the twist ending. At 10 p.m. the patrolman 2___________ moved up the avenue and met Bob, who was 3__________ his old friend, Jimmy, 4___________ ago in the doorway of a 5__________hardware store. They talked a while and the patrolman went on along his beat.Twenty minutes later, “Jimmy” 6_________ with coat collars high. Bob boasted his life in the West, while “Jimmy” listened with interest. In the brilliant light of a drugstore, they gazed at each other’s face 7_______________, and Bob recognized it was not Jimmy at all. Bob was the “8______Bob”, wanted by the police in Chicago and he was 9________ by “Jimmy”, a policeman in plain clothes. The patrolman left a 10______ to Bob and said he was Jimmy and he cannot arrest his friend by himself.
一对江西的夫妇来到杭州，在小区附近租了一家20平方米的店铺做早餐生意，他们属于哪种类型的创业者？
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