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【T10】 A.WHOLE B.GET C.FROM A.INDIA AS A【T7】______ADDS ALMOST 20 MILLION PEOPLE A YEAR B.KEEP KERALA【T8】______PUTTING ADDED PRESSURE C.KERALA HELP GIRLS AND BOYS【T9】______EQUALLY GOOD SCHOOLING SHOULD THAT HAPPEN, IT WON'T BE THE FAULT OF THE ENLIGHTENED WOMEN OF KERALA, A STATE IN SOUTHERN INDIA.WHILE【T10】______, KERALA'S POPULATION IS VIRTUALLY STABLE . THE REASON IS NO MYSTERY:NEARLY TWO-THIRDS OF KERALA WOMEN PRACTICE BIRTH CONTROL, COMPARED WITH ABOUT 40% IN THE ENTIRE NATIO N. THE DIFFERENCE LIES IN THE EMPHASIS PUT ON HEALTH PROGRAMS, INCLUDING BIRTH CONTROL, BY THE STATE AUTHORITIES, WHICH IN 1957 BECAME INDIA'S FIRST ELECTED COMMUNIST GOVERNMENT .AND AN EDUCATIONAL TRADITION AND MATRILINEAL (母系的) CUSTOMS IN PARTS OF【T11】______. WHILE ONE IN THREE INDIAN WOMEN IS LITERATE , 90% OF THOSE IN KERALA CAN READ AND WRIT E. HIGHER LITERACY RATES FOSTER FAMILY PLANNIN G.'UNLIKE OUR PARENTS, WE KNOW THAT WE CAN DO MORE FOR OUR CHILDREN IF WE HAVE FEWER OF THEM,' SAYS LAIAL CHERIAN, 33, WHO LIVES IN THE VILLAGE OF KUDAMALOOR.SHE HAS LIMITED HERSELF TO THREE CHILDREN—ONE BELOW THE NATIONAL AVERAGE OF FOUR.THAT KIND OF RESTRAINT (抑制,克制) WILL【T12】_______ON WORLDFOOD SUPPLIES.
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【简答题】已知某二端网络端电压u=100+100sint+50sin2t+30sin3tV,流过的电流i=10sin(t-60°)+2sin(3t-45°)A,试求二端网络吸收功率。
【单选题】已知某负载的端电压u=100 SinωtV,电流i=10 Sin(ωt-60°)A,其有功功率为()
A.
250W
B.
500W
C.
1000W
【判断题】电路发生串联谐振时,路呈电阻性,电路电压与电流同相
A.
正确
B.
错误
【简答题】幼儿的认识活动以 为主,开始向抽象逻辑性发展。
【单选题】幼儿的认识活动以 为主,开始向抽象逻辑性发展。
A.
具体性
B.
生动形象性
C.
具体形象性
D.
形象性
【单选题】( 尾线 008R) 在安装中控台后盖板时,中控台后部烟灰缸总成与中控台骨架缝隙为( )。
A.
缝隙( 0 ±0.5)mm
B.
缝隙( 1 ±1)mm
C.
缝隙( 2 ±0.5)mm
【单选题】RLC串联电路发生谐振时,下列说法正确的是( )。
A.
电路呈现电阻特性,且此时电路阻抗最大
B.
电路阻抗最大,电流也最大
C.
电感和电容两端的电压大小相等,方向相反,等于电源电压的 Q倍。
D.
电感和电容两端的电压大小相等,方向相反,等于电源电压的 Q+1倍
【单选题】对流传热以( )作为基本计算式。
A.
傅里叶定律
B.
牛顿冷却公式
C.
普朗克定律
D.
热路欧姆定律
【简答题】当电源电压不变,改变频率使 RLC 串联电路发生谐振时,电路的阻抗最 , 电流最 ,电路呈 性,感抗与 相等。
【单选题】当 RLC 电路发生串联谐振时,下列选项( )是错误的。
A.
电流最小
B.
电路呈电阻性
C.
阻抗最小
D.
电路电压电流同相
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