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已婚妇女，26岁，因停经49天，尿妊娠试验(+)，要求行人工流产术。术前妇科检查：宫体后倾后屈，稍大稍软，附件未扪及，术中测宫腔深9cm，吸出物未见绒毛，出血少 哪项辅助检查对排除宫外孕最有价值
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Trillions of incredibly tiny diamonds, possibly formed by a dying star before the solar system was born 4.5 billion years ago, have been found by researchers (26) four meteorites. The powder-like diamonds could be among the oldest things in the (27) , said Roy Lewis, senior research associate at the University of Chicago. The diamonds may (28) clues about the chemistry of stars, and if scientists can determine how they formed, that could suggest better ways of manufacturing tiny diamonds for (29) purposes, he said. "It’s quite possible that nature is doing it more (30) than we’ve been doing it," he said. "So maybe we’ve got something to learn." The new find is (31) , said John Wood, staff scientist at the Harvard-Smithsonian Centre for Astrophysics. Although diamonds have been found before in meteorites, they were formed relatively recently (32) the shock of impact, he said in a telephone interview. But Wood said the new report made him "quite sure" the newly found diamonds are older than the sun. Lewis said researchers never expected to find diamonds when they started (33) a stone-like meteorite that had plunged into Mexican cornfield in 1969. They were studying an unusual carbon dust in the meteorite, and to purify the sample they went though several steps to dissolve other materials. They expected the sample to remain black through the purification, but to their surprise in the final step it turned (34) . Lewis said they believed the final stage had dissolved the carbon they wanted to study. But tests showed that the white residue was in fact made of carbon. Other tests found that it contained an unusual combination of forms of the gas xenon, (35) that it came from outside the solar system. Still another battery of tests (36) the residue as diamond dust, so fine that a row of 20,000 grains would extend about the (37) of a human hair. The researchers also found diamonds in three other meteorites, Lewis said. Tests showed all four meteorites were as old as the solar system, and that the embedded diamonds did not form within the meteorite (38) of collisions. So the diamonds must have (39) somewhere else before the meteorites formed, making them as old or older than the solar system. The diamonds may have formed in the upper atmosphere of a star in the late "red giant" stage, where the temperature and abundance of hydrogen could (40) diamonds to form as carbon gas condenses.
Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation. Where does the woman say the driftwood was found
OVER 55 MILLION DOLLARS AWARDED TO 1,703,289 WINNERSStates 1989 Sweepstakes Total Dollar Winnings Dollars Amount: In Sweepstakes To Date:California $233,080.00 $4,019,404.00Florida $104,660.00 $6,664,267.00Illinois $190,520.00 $2,283,577.00Michigan $51,260.00 $1,747,890.00New York $59,440.00 $2,367,146.00Ohio $44,580.00 $1,786,956.00Pennsylvania $5,146,260.00 $6,621,469.00Texas $72,940.00 $2,465,074.00Virginia $29,280.00 $862,057.00Washington $51,600.00 $802,596.00Wisconsin $46,940.00 $1,302,603.00In addition 24,544 lucky people from 39 other states won another $611,540.00 in 1989 alone.Total for all states $6,642,000.00 $56,945,244.00 The total winnings in Sweepstakes for all states amount to ______ to date.
How warm parents are with their children has a strong influence on the childrens personalities. Boy who are highly masculine, for example, tend to see their fathers as very warm and regarding. The warmth of both parents tends to lead to more feminity in girls. The influence of the fathers seems to be more important, since fathers generally treat male and female children differently as compared to mothers who treat male and female children in a more similar manner. The passage is mainly about ______.
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