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【单选题】
处理喉痉挛的首先措施是A.
静注琥珀胆碱
B.
快速气管插管
C.
环甲膜穿刺
D.
气管切开
E.
面罩加压吸氧
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【简答题】(原创)在“探究导体电阻与其影响因素的定量关系”的实验时,某同学想测定某金属丝的电阻率. 1用毫米刻度尺测量金属丝长度为L=80 . 00 cm,用螺旋测微器测金属丝的直径如图所示,则金属丝的直径d为________. 2按如图所示连接好实际电路,测量金属丝的电阻R.改变滑动变阻器的阻值,获得六组I、U数据描在图中所示的坐标系上.由图可求得金属丝电阻R=________Ω,该金属丝的电阻率ρ=__...
【单选题】Microsoft and Jackson's view on Microsoft's monopoly in terms of the consumer's benefit is that______.
A.
the integration of Web browsing software into Windows benefits milfions of consumers
B.
the software vendor does not prevent users from obtaining Netscape Navigator
C.
many consumers can benefit from Microsoft's provision of Web browsing functionality with its Windows operating system free of charge
D.
all of the above
【简答题】如图所示电路中C 1 =10 -3 F，L 1 =0.3H，L 2 =0.6H，M=0.2H，R=10Ω， ，C可变动，试求C为何值时，R可获得最大功率?并求出最大功率。
【单选题】Learn to be a smarter consumer Today we continue the theme of this year's National Consumer Protection Week, 'Reach Up and Reach Out: Be an Informed Consumer' , with a repeat of Action's ' 10 Commandm...
A.
To advertise popular products.
B.
To educate the consumer.
C.
To protect the salesman.
D.
To support new laws against over-priced goods.
【简答题】习题9-33图所示电路中，R 1 =1Ω，C 1 =10 3 μF， L 1 =0.4mH，R 2 =2Ω， ，ω=10 3 rad/s。求Z L (可任意变动)能获得的最大功率。
【简答题】磁粉探伤设备内的降压变压器输出的是( ) a. 高电压大电流; b. 高电压低电流; c. 低电压大电流; d. 低电压小电流
【单选题】Which of the following statements best describes a consumer's budget line?
A.
It shows all combinations of goods among which the consumer is indifferent.
B.
It shows the limits to a consumer's set of affordable consumption choices.
C.
It shows the desired level of consumption for the consumer.
D.
It shows the consumption choices made by a consumer.
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