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淡水过滤器()按钮:在全自动状态下,在运行过程中每按一次该按钮程序运行至最后一个流程(即沉降)结束,自动停止
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商业性非专项授信额度调增由()审批
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图为甲、乙、丙、丁四地的气候资料,图中各点代表月均温和月降水量。回答下列问题。 四地中,高温期与多雨期比较一致的是() 甲、乙、丙、丁四地的气候与对应的城市吻合的是()
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在使用施工蓝图编制竣工图时,必须使用()。
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从选择材料角度来看,()对改善电流非线性误差有显著作用。
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焊接工字型截面梁腹板设置加劲肋的目的()
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古人采用验痰和验口味以诊断的疾患是()
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Today ,as in every other day of the year ,more than 3000 U.S. adlescents will smoke their first cigarette on their way to becoming regular smokers as adults. During their lifetime,it can be expected that of these 3000 about 23 will be murdered,30 will die in traffic accidents, and nearly 750 will be killed by a smoking-related disease. The number of deaths attributed to cigarette smoking outweithts all other factors, whether voluntary or involuntary, as a cause of death. Since the late 1970s, when daily smoking among high school seniors reached 30 precent , smoking rates among youth have declined . While the decline is impressive ,several important issues must be raised. First, in the past several years,smoking rates among youth have declined very little. Second,in the late 1970s ,smoking among male high school seniors exceeded that among female by nearly 10 percent . The statistic is reversing.Third ,several recent studies have indicate high school dropouts have excessively high smoking rates, as much as 75 percent . Finally, thouth significant declines in adolescent smoking have occurred in the past decade,no definite reasons for the decline exist. Within this context,the Naional Cancer Instiute (NCI) began its current effort to determine the most effecive measures to reduce smoking levesl among youth. By "dropout" the author means().
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更换吊钩时,如难以采购到锻钩,也可以使用铸造吊钩代替用。()
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周围神经病所影响的神经纤维是()