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【单选题】
光谱分析法与其他分析法的不同点在于光谱分析法涉及到（ ）A.
试样通常需要预处理以消除干扰组分
B.
光电效应
C.
复杂组分的分离和两相分配
D.
辐射光与试样间的相互作用与能级的跃迁
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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【简答题】完成个人作业; 2.根据实验实验指导书(第二周)实验1项目开发准备工作,小组共同完成实验1并根据实验1要求完成相关要求并提交(小组长提交,其他同学提交小组长名字); 3.下周课堂小组分享自己小组的实验1完成内容,特别是你们小组项目安排的甘特图,系统流程图,人员分工安排等,包含思考题,请组长安排好分享人及分享内容(抽查);
【单选题】The boy promised ____ mother never to lie to ____ again.
A.
his ；him
B.
her ； her
C.
her ；him
D.
his ；her
【简答题】In the short conversation with Mangan's sister, the boy promised to get something for her from the bazza, The joruney made hime realize something but a promise ws still a promise though the girl might...
【单选题】The boy promised ______late for school again.
A.
to not be
B.
not to be
C.
not being
D.
being not
【单选题】The boy promised _____ mother never to lie to _____ again.
A.
his ; him
B.
her ; her
C.
his ; she
D.
his ; her
【单选题】The boy promised______ in the exam any more.
A.
not to cheat
B.
not cheating
C.
to not cheat
D.
not to have cheated
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