Specific ideas: putting sticky tape on someone’s chair, putting a “kick me” sign on someone’s back, putting hot pepper in someone’s cerealThe general idea is:

A .  alter tablespace MY_DATA begin backup B .  alter tablespace MY_DATA start backup C .  alter tablespace MY_DATA backup begin D .  alter MY_DATA begin backup E .  You cannot back up individual tablespace

A . 单位时间飞过的距离 B . 单位时间飞机的油耗 C . 单位燃油飞机前进的距离

A . 正确 B . 错误

In the early nineteenth century, people did not use stamps. They had to pay postage (邮费) when they received letters. Sometimes they didn't want to receive a letter at all, but they had to pay money for it. They were unhappy about this. The postage was high at that time, because the post offices had to send many people to get the postage. Rowland Hill was a school teacher in England. He was the first to think of using stamps in 1850s. He thought it would be much easier for people to use stamps. People could go to the post office to buy stamps and put them on envelopes before they sent the letters. The post office could just put seals (邮戳). on the stamps so that people could not use the stamps again. In this way, the post office did not need to send post men to get postage. It only needed fewer postmen to send letters. People began to use stamps ______. A．at the beginning of the nineteenth century B．in the middle of the nineteenth century C．more than two hundred years ago D．when people first sent letters and postcards.

A.discourages B.shows C.surprises D.frightens

Selye claimed that it was not stress that harmed us, but distress, and distress occurred when we prolonged emotional stress and didn't deal with it in a positive manner. Selye was the pioneer in research into stress in the 1930s, and is internationally acknowledged as "the father of the stress field'. After publishing the first scientific paper to identify and define "stress" in 1936, Selye wrote more than 1700 scholarly papers and 39 books on the subject. At the time of his death 1982, his work had been cited in more than 362,000 scientific papers, in countless popular magazine stories, and in most major languages. Selye held three earned doctorates (M. D. , Ph. D. , D. Sc. ) plus 43 honorary doctorates, tie was an elected member of several dozen of the world's most recognized medical and scientific associations. After completion of his academic and professional studies in Prague, Paris, and Rome, Selye received a Rockefeller Research Fellowship and accepted a position at Johns Hopkins University in Baltimore, Maryland. By 1945 he had become the first Director of tile Institute of Experimental Medicine and Surgery at the University of Montreal, Canada. He served in that position until his retirement in 1976. Subsequently he established the International Institute of Stress. He recognized that strain, or stress, plays a very significant nile in the development of all types of disease. Selye called the process whereby strain influences the body, the General Adaptation Syndrome. He concluded that there are three distinctive phases in this process: alarm, resistance, and exhaustion. He wrote of two types of stress: pleasant stress contributing to human well-being, and unpleasant stress contributing to disease. He is still by far the world's most frequently cited author on stress topics. What does the passage mainly discuss？ A．Selye's professional life and achievements. B．The origins of the word "stress". C．Defining stress. D．The father of the stress field.

是 否

A．having B．site C．name D．occur