The next decade could see commuters
speeding to work at about 300 miles per hour aboard magnetic levitation
vehicles, according to a report by Argonne National Laboratories. But before
"maglev" vehicles can become commercial successes, the report says, people need
to stop thinking of them as high-speed trains. Instead, consider them low-flying
aircraft. Argonne contends that maglev vehicles will be best suited to replace
commuter aircraft. Plane flights under 600 miles are the least energy-efficient,
and maglev "planes" should cut these fuel needs by up to 75 percent. Reportedly,
the money saved by a 2,000- mile maglev network linking major cities world more
than pay for its construction in 20 years. The quiet purr of levitating crafts
would also be a balm for neighborhoods tormented by the roar of conventional
takeoffs and landings. The technolo A. France and West Germany. B. Japan and West Germany. C. the United States and Japan. D. West Germany and the United States. [单选题]互感器的安装、更换、拆除、现场校验应停电进行,一次侧有明显的( ),二次回路断开。
A.短路线 B.回路 C.接地线 D.断开点 [判断题]判断题:油液加热的方法有用热水或蒸汽加热和电加热两种方式。由于热水加热器使用方便,易于自动控制温度,故应用较广泛。
A.正确 B.错误 [单项选择]某女,月经后期,量少色暗有块,小腹冷痛喜暖,畏寒肢冷,苔白脉沉紧,证属:
A. 血瘀型 B. 虚寒型 C. 血寒型 D. 气滞型 E. 阳虚型 [单项选择]隐蔽工程在隐蔽前,施工单位应当通知建设单位和( )。
A. 上级主管部门 B. 设计单位 C. 建设工程质量监督机构 D. 工程监理单位 [简答题]征稿启事
“我的一家”栏目在《家庭生活》杂志上刊出以来,受到广大读者的关注和好评。为了展现千姿百态的家庭生活,共创和谐的家庭氛围,我们特向广大读者征集稿件,欢迎投稿。
1.写家庭中的某位或多位成员;
2.记发生在家庭中的趣事;
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"My Family" attracts the eyes of the readers and is warmly received by ’them since it is prin- ted on the Family Life.
[单选题]肺气肿患者胸廓呈 ( )
A.鸡胸 B.扁平胸 C.漏斗胸 D.桶 状 胸 E.一侧胸廓膨隆 我来回答: 提交
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