皮皮学，免费搜题
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搜题
【单选题】
如图所示 , 在半径为 、电荷体密度为ρ 的均匀带电球体内部 , 有一个半径为 的球形空腔 , 空腔中 心 与球 心 之间的距离为 a , 下列说法中正确的是[ ].A.
可以取一面，直接用定理求空腔内任一点处的电场强度
B.
空腔内的电场为均匀电场
C.
空腔内的电场不可能为均匀电场
D.
无法确定空腔内任一点处的场强大小
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皮皮学刷刷变学霸
举一反三
【单选题】Last week the writer went to the theatre . He was the theatre.
A.
on
B.
at
C.
to
D.
into
【单选题】Last week the writer went to the theatre. He was ______ the theatre.
A.
to
B.
At
C.
into
D.
On
【单选题】Last week the writer went to the theatre. Ha was ____the theatre.
A.
to
B.
at
C.
into
D.
on
【单选题】Last week the writer went to the theatre. He was ______ the theatre.
A.
to
B.
at
C.
into
D.
On
【单选题】Last week the writer went to the theatre . He was the theatre.
A.
to
B.
at
C.
into
D.
on
【简答题】结合本单位部门职能分工，成立以（ ）为领导的应急预案编制工作组，明确编制任务、职责分工，制订工作计划。
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