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【单选题】
下列说法中正确的是（）。A.
等势面上各点的场强大小一定相等
B.
场强处处相同的电场中，各点的电势也必定处处相同
C.
沿着电场线移动负电荷，负电荷的电势能是增加的
D.
初速度为零的点电荷，仅在电场力作用下，总是从处向低电势处运动
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【单选题】During the period of English Renaissance, ______ was the keynote of the intellectual movement.
A.
literature
B.
superhuman
C.
h umanism
D.
God
【单选题】每只100lx、使用寿命为1000h 的灯泡在服役期共消耗1000 kwh电能；某服务需要1000只这种灯泡，服役中将消耗（ ）电能Each 100lx bulb with a service life of 1000h consumes a total of 1000 kwh power during the service period; 1000 such bulbs are require...
A.
1Kwh
B.
1Mwh
C.
1Bwh
D.
100000Kwh
【单选题】During the period of H1N1 flu,people______not to go to public places
A.
had always been warned
B.
were always being warned
C.
were always warning
D.
always warned
【单选题】每只100lx、使用寿命为1000h 的灯泡在服役期共消耗1000 kwh电能；某服务需要1000只这种灯泡，服役中将消耗（ ）电能Each 100lx bulb with a service life of 1000h consumes a total of 1000 kwh power during the service period; 1000 such bulbs are require...
A.
1kwh
B.
1Mwh
C.
1Bwh
D.
100000kwh
【简答题】无菌包装包括的四个要素是:( );( );( );( )。
【简答题】2–19 The lighting needs of a storage room are being met by 6 fluorescent light fixtures, each fixture containing four lamps rated at 60 W each. All the lamps are on during operating hours of the facil...
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