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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
【判断题】旅游者的所属群体的规模大小,影响旅游者的从众行为。
A.
正确
B.
错误
【单选题】构成心外膜的结构是
A.
纤维心包
B.
浆膜心包的壁层
C.
纵隔胸膜
D.
浆膜心包的脏层
E.
脏层胸膜
【单选题】新鲜尿液呈现混浊的动物是
A.
B.
C.
D.
【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】新鲜尿液呈现混浊的动物是
A.
B.
C.
D.
【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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