[单选题]线路直线地段采用的标准轨距是（）mm。-我要搜题网

[不定项选择题]共用题干 Energy and Public Lands
The United States boasts substantial energy resources. Federal lands provide a good deal of US energy production,the US Department of the Interior manages federal energy leasing （租赁）both on land and on the offshore Outer Continental Shelf Production from these sources amounts to nearly 30 percent of total annual US energy production.
In 2000,32 percent of US oil,35 percent of natural gas,and 37 percent of coal were pro-duced from federal lands,representing 20,000 producing oil and gas leases and 135 producing coal leases. Federal lands are also estimated to contain approximately 68 percent of all undis-covered US oil reserves and 74 percent of undiscovered natural gas.
Revenues from federal oil,gas,and coal leasing provide significant returns to US taxpayers as well as State Government. In 1999,for example,$553 million in oil and gas revenues were paid to the US Treasury,and non-India coal leases accounted for over$304 million in revenues,of which 50 percent were paid to State governments. Public lands also play a critical role in energy delivery. Each year , federal land managers authorize（许可）rights of way for transmission lines , rail systems , pipe-lines,and other facilities related to energy production and use.
Alternative energy production from federal lands falls behind conventional energy pro-duction , though the amount is still significant. For example , federal geothermal（地热）re-sources produce about 7. 5 billion kilowatt-hours（千瓦时）of electricity per year,47 percent of all electricity generated from US geothermal energy. There are 2,960 wind turbines on public lands in California alone,producing electricity for about 300,000 people. Federal hydropower （水电）facilities produce about 17 percent of all hydropower produced in the United States.
Because of the growing US thirst for energy and increasing public unease with depend-ence on foreign off sources,pressure on public lands to meet US energy demand is becoming more intense. Public lands are available for energy development only after they have been evaluated through the land use planning process.If development of energy resources conflicts with management or use of other resources,development restrictions or impact moderation measures may be enforced,or mineral be banned altogether. What is the main idea of this passage?
A.Public lands are one of the main sources of revenues.
B.Public lands should be developed to ease energy shortage.
C.Public lands play an important role in energy production.
D.Public lands store huge energy resources for further development.

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[不定项选择题]患者前尿道损伤后多见（）。
A.全程血尿
B.终末血尿
C.初期血尿
D.镜下血尿
E.血红蛋白尿

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[单选题]1 "室外燃气管道进行强度试验时，压力应逐步缓升，首先升至试验压力的50％，应进行初检，如无泄露、异常，继续升压至试验压力，然后宜稳压（）后，观察压力计不应小于30 min ，无压力降为合格。
A.120 min
B.60 min
C.30 min
D.45 min"

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[多项选择]以下哪类设置在变动更改后是即时生效的？（）
A. 授信和限额管理
B. 新增托管账户
C. 基金净值提交
D. 删除资金账户

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[判断题]事故应急处理,可不用操作票,但在操作完成后应作好记录,事故应急处理应保存原始记录。( )
A.正确
B.错误

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[判断题]客运企业应建立健全接驳运输台账，接驳运输台账、行车单、车辆动态监控信息、接驳过程相关图像信息等保存期限不少于6个月。
A.正确
B.错误

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[单选题]一满杯纯牛奶，喝去20%后用水加满，再喝去60%。此时杯中的纯牛奶占杯子容积的百分数为( )。
A.52%
B.48%
C.42%
D.32%