试题与答案

用单色光照射双缝,双缝间距等于0.06cm,缝到屏的距离为1.5m,若测得屏上7

题型:问答题

题目:

用单色光照射双缝,双缝间距等于0.06cm,缝到屏的距离为1.5m,若测得屏上7条亮条纹之间相距9.0mm,则此单色光的波长是多少?

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0606/ecde006429b2d403911c1903e06ecbc3.html

下面是错误答案,用来干扰机器的。

小题1:B小题2:D小题3:B小题1:本题考查自然灾害的成因。能够增加滑坡灾害频度的人类活动是在陡坡上堆放大量废渣。植树造林;缓坡上修筑梯田;长江三角洲地区挖渠引水形成滑坡的可能性较小。所以本题选择B选项。小...

试题推荐
题型:阅读理解

The US will seek to expand its own oil production in an attempt to reduce dependence on imported oil and bring down fuel prices , President Obama says . New contracts for exploration will be signed in non-protected areas of Alaska and in the Gulf of Mexico.

In his weekly speech , the President insisted the US could reduce its need for imported oil and improve safety. Using his speech to tell Americans that he understood their concerns about rising prices, President Obama focused particularly on the price of fuel, which has risen in recent months.

US consumers have historically enjoyed cheap fuel , but have seen prices rise in recent months even though US oil production in 2010 reached its highest level for seven years.

Although the oil spill in the Gulf of Mexico in 2010 was serious, Mr Obama said the Gulf remained a key part of the country’s future energy supply.

The President’s proposals (议案)come after Republicans (共和党人) introduced a series of proposals that would expand and speed up oil and gas production.

The White House has criticized the Republican proposals for safety reasons , but Mr Obama was clear in his speech that he felt safety and environmental standards could be maintained even though production might rise.

“ I believe that we should continue to expand oil production in America —even as we increase safety and environmental standards ,”he said.

“As a nation, we should be investing in the clean, renewable sources of energy that are the solution to high gas prices.”

Mr Obama has previously called for a step-change in energy policy, saying the US must move towards getting 80%of its electricity from clean energy sources by 2035.

小题1:Which of the following is NOT included in Mr Obama’s speech?

A.The dependence on imported oil.

B.Improving safety standards

C.The reason for the rising oil prices .

D.Expanding oil production.小题2:Mr Obama thinks the Republican proposals are ______.

A.Not safe enough

B.Not environmentally friendly

C.Practical

D.Clear小题3:What can we learn from the text ?

A.The US has got most of its electricity from clean energy.

B.US oil production is too small to keep the present low fuel prices.

C.The US produced the most oil in 2010 in its history.

D.The Gulf is still important in energy supply in spite of the oil spill in 2010.小题4: Which of the following can serve as the title?

A.Obama: US will seek oil in Alaska and Gulf of Mexico.

B.Obama: US will import less oil to improve safety and environmental standards .

C.Obama: the time of high fuel prices will be gone.

D.Obama: clean, renewable sources of energy are the solution to high gas prices

查看答案
微信公众账号搜索答案