皮皮学，免费搜题
登录
搜题
【多选题】
某同学在做双缝干涉实验时,安装好实验装置,在光屏上却观察不到干涉图样,这可能是由于( )A.
光束的中央轴线与遮光筒不一致，相差较大
B.
滤光片、单缝、双缝的中心在同一高度
C.
单缝与双缝不平行
D.
光源发出的光太强
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】听力原文：How many times did he bother the people in his row? Be bothered the people ______.
【简答题】How many people did Larry approximately rescue? Approximately __________.
【单选题】平面任意 力系简化时若取不同的简化中心,则
A.
力系的主矢、主矩都会改变
B.
力系的主矢不会改变，主矩一般会改变
C.
力系的主矢会改变，主矩一般不改变
D.
力系的主矢、主矩都不会改变
【单选题】— How did the Chinese doctors get to Haiti (海地) to help the people there? — They got there ______ plane. [ ]
A.
take
B.
by
C.
on
D.
took
【简答题】How many times did he bother the people in his row? Be bothered the people ______.
【简答题】How many people did IBM employs in South Africa?
【简答题】How did the people who were staying in the hotel run out? They ran out ______.
【单选题】How did people feel about the financial report?
A.
Dissatisfied
B.
Confused
C.
Happy
D.
Shocked
相关题目：
【单选题】平面任意 力系简化时若取不同的简化中心,则
A.
力系的主矢、主矩都会改变
B.
力系的主矢不会改变，主矩一般会改变
C.
力系的主矢会改变，主矩一般不改变
D.
力系的主矢、主矩都不会改变