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如图所示,虚线a、b、c、d表示匀强电场中的4个等势面,两个带电粒子M、N(重力忽略不计)以平行于等势面的初速度射入电场,运动轨迹分别如图中MPN和NOM所示。已知M是带正电的带电粒子,则( )。
简述实物媒介。
色氨酸可以在体内少量合成下列哪种维生素?( )
“路曼曼其修远兮,吾将上下而求索”是()的名句。
肛痈的临床特点是()
训练方法是指为达到训练目的所采用的()。
以下哪种证件需扫描在金融许可栏位处?()
评估系统资源的运行状况及通信效率,归属于()
内部账户批量开户时,交易柜员为总行内部户管理部门,批量开户,对多机构单一产品开立专户,开立不成功。
阴部瘙痒难忍,带下量多,色黄如脓,呈泡沫样,味腥臭。食欲不振,口苦咽干,小便黄赤,舌质红,苔黄腻,脉弦数。其治则是()
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He is younger than().
David's younger brother is()engineer
David's younger brother is()engineer.
How are the younger and older generations in China different?
David's younger brother is()engineer
When the woman was younger, what did she and her brother often argue about?
David's younger brother is()engineer.
When the woman was younger, what did she and her brother often argue about?
The younger motorman as well as the others () to operate the oil separator.
The younger motorman as well as the others () to operate the oil separator.