皮皮学，免费搜题
登录
搜题
【单选题】
用波长λ = 500 nm 的单色光垂直照射在每厘米 2000 条刻痕的光栅上,第五级明纹对应的衍射角为( )A.
30 ° ；
B.
45 ° ；
C.
60 ° ；
D.
90 ° ；
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】---Do you work here? ---No, I_______ the manager until the secretary comes back. A.will help B help C. helped D. am helping
【简答题】Research shows that people who make decisions quickly , even when 1 information, tend to be more satisfied with their decisions than people who research and carefully 2 their options. Some of this dif...
【简答题】选词填空 A.make an appointment B.invite C.informed D.get everything ready E.hold a conference Our company will ____ on the development of new markets tomorrow. Doctor Smith is very busy, so you...
【单选题】If they do not give us a treat, we can play a trick ________ them.
A.
at
B.
on
C.
for
D.
to
【单选题】If you were to begin a new job tomorrow, you would bring with you some basic strengths and weaknesses. Success or failure in your work would depend, 【C1】______ a great extent, 【C2】______ your ability ...
A.
on
B.
for
C.
of
D.
to
【多选题】关于资金时间价值的说法，正确的有______。
A.
资金时间价值表现为考虑风险和通货膨胀条件下的社会平均资金利润率
B.
资金时间价值可以用利息和利率来衡量
C.
利息是衡量资金时间价值的相对尺度
D.
为使不同时间点的资金在时间价值上具有可比性，通常利用资金时间价值单利计息公式来进行转换
E.
资金时间价值表现为同一数量的资金在不同时闻点具有不同的价值
相关题目：