皮皮学,免费搜题
登录
搜题
【多选题】
拉曼-纳斯衍射的特点有( )
A.
衍射效率与附加相位延迟有关
B.
形成与入射方向对称分布的多级衍射光
C.
声光介质可视为相对静止的“平面相位栅”
D.
只限于低频工作,只具有有限的带宽
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
【单选题】测定砂浆抗压强度的标准试件的尺寸为( )
A.
70.7mmX70.7mmX70.7mm
B.
70mmX70mmX70mm
C.
100mmX100mmX100mm
D.
40mmX40mmX160mm
【单选题】With the aid of the most advanced equipment, new facts about the ancient pyramids in Egypt have recently . [     ]
A.
brought to light
B.
seen the light
C.
thrown light upon
D.
come to light
【简答题】条约 n.
【简答题】The buyer should pay 100% of the sale amount to the Seller in advance by telegraphic transfer not later than August 20 th .
【单选题】《公园设计规范》中,建筑内部和外缘,凡游人正常活动范围边缘临空高差大于1M处均设护栏设施,其高度应大于()。
A.
1.00
B.
1.05
C.
1.10
D.
1.15
【单选题】《公园设计规范》中,建筑内部和外缘,凡游人正常活动范围边缘临空高差大于()M处,均设护栏设施,其高度应大于1.05米。
A.
0.8
B.
1.0
C.
1.2
D.
1.4
【单选题】Which of the following is TRUE about the plan?( )
A.
Ninety-five theatres have received funding.
B.
Everyone will get at least one free ticket.
C.
It may not benefit all the young people.
D.
Free tickets are offered once every day.
【单选题】测定砂浆抗压强度的标准试件的尺寸为( )。
A.
70mm*70mm*70mm
B.
70.7mm*70.7mm*70.7mm
C.
100mm*100mm*100mm
D.
150mm*150mm*150mm
【单选题】根据短文回答 46~50 题。 Home Schooling All children in the United States have to receive an education, but the law does not say they have to be educated at school. A number of parents prefer not to send their...
A.
Interestingly, results show that home-schooled children quite often do better than average on national tests in reading and math.
B.
Critics also say that most parents are not well qualified to teach their children.
C.
Learning starts with the children's interests and questions.
D.
Children who are educated at home are known as 'home-schoolers.'
E.
In some countries, however, children are educated by their parents.
F.
If the Brazilian rain forests are on the TV news, it could be a perfect time to talk about how rain forests influence the climate, and how deserts are formed.
【简答题】The buyer should pay 100% of the sale amount to the Seller in advance by telegraphic transfer not later than August 20th.
相关题目: