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绘制航路图时，须绘出（）经线和（）纬线.
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离心旋涡泵如将离心叶轮放在旋涡叶轮之后则（）。
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压缩机开机前准备工作有哪些？
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知识学习是增长经验、形成技能、发展创造力的重要前提。
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内部宣传常用的手段有()。A.组织报纸B.举办展览会C.职工手册D.黑板报E.讨论会
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When Betty Burwood won the national lottery, she and her husband, Bill, moved into abeautiful big bungalow and she bought herself a very expensive pearl necklaceThe following summer, the Burwoods decided to throw a party. Early on the afternoonof the party, Betty took her new silk dress out of the wardrobe and put her expensive pearlnecklace on her dressing-table ready to put on in the evening. Then, she went to see how thepreparations for the party were goingThe catering company had just arrived - a cook, Mrs. Moore, and her two helpers,Nancy and Harriet. They were all in the kitchen unpacking the piles of boxes which they hadbrought with them. Soon, the fourth member of the team, Charlie Chivers, arrived on hisbicycleBy six o' clock, everything was ready. The garden looked magnificent - with smallround tables and colorful chairs and sun shades. The food and drink was all laid out in thekitchen, ready to be brought out when the guests arrivedAt ten past six, Betty went to her bedroom to get ready. She showered and put on herbest silk dress. It was when she was brushing her hair that she realized that her pearls werenot on the dressing-table. "Bill," she said, "have you moved my pearls?" "No, dear,"answered Hill, "where were they?" "1 put them on the drussing-tabie this afternoon andthey're not here now. ""Are you sure?" asked Bill. "Maybe you put them down somewhereelse, or maybe you,ye moved them"For a quarter of an hour they searched for the missing pearls, but couldn't find themanywhere. It was then that they decided they must call the policeSoon, Inspector Morgan arrived and started to question all the suspectsRead Passage 1 and then try to give short answers 协 Questions 1-5. Write your answers on theAnswer Sheeti. Why could Betty afford an expensive necklace?2. Why did she take her necklace out early in the day?3. How many people were there in the catering company?4. What do you think was in the boxes?5. Did the Burwoods call the police after they couldn't find the pear's?Read again and then fill in the following blanks numbered 6-10 with the information from the passage. Write you answers on the Answer Sheet
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某厂共有机器10台，生产某种商品每台机器的产能为10件，现有一批500件的这类商品要生产，机器每天工作时间为24小时，损耗为2%，生产这批商品需要（）小时。
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响墩和火炬，每年至少做一次检定试验，不合格者及时更换。
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韦氏成人智力测验的2个分量表包括（）。