题干

如图所示,对下列光学现象的描述或解释错误的是                            【    】

 

A:图(a)中漫反射的光线尽管杂乱无章,但每条光线仍然遵循光的反射定律

B:图(b)中木工师傅观察木板是否平整,是利用了光的直线传播特点

C:图(c)所示炎热夏天公路上的海市蜃楼景象,是由光的反射现象造成的

D:图(d)所示是太阳光经过三棱镜色散后的色光排列情况

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C

同类题1

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    On Tuesday, scientists announced that they have discovered the bones of four settlers in Jamestown, Virginia. Jamestown was the first permanent English settlement in what become the United States. The bones were unearthed under the floor of a Jamestown church which was discovered in 2010 and is considered as America‘s first Protestant church.

    The Jamestown Rediscovery Foundation at Historic Jamestowne and the Smithsonian's Museum of Natural History announced that the settlers held high leadership positions. The men, Rev.Robert Hunt,Capt. Gabriel Archer,Sir Ferdinando Wainman,and Capt. William West, all played a role in the Jamestown settlement. After being lost to history for more than 400 years, the discovery of their remains provides new clues about their life and the importance of religion in the 1600s.

    “This is a very important discovery,” Jamestown Rediscovery Foundation President James Horn said in a statement. “These men were among the first founders of English America."

    About 100 people settled along the James River in what would become the first English settlement m 1607. During that time, settlers in Jamestown were faced with famine and disease The colony was nearly wiped out due to conflict with Native Americans in the area and with other English settlers.

    "They lived and died at a hard time in the history of the settlement , when Jamestown almost ended in  failure," Horn said. “The bones of these men help fill in the stories of their lives ”

    The Smithsonian and the Rediscovery Foundation found the remains in November of 2013. Scientists used 3-D technology to locate the exact gravesites of the men. The team wanted to identify its findings before announcing the discovery. They identified the men using historical records and studied the chemicals of the bones to learn what the men ate and where they came from.

    Findings from the burials will go on display within weeks at Historic Jamestowne. The site also plans to honor the men and will keep their bones in a safe place for future study.

同类题3

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    On August 26,1999,New York City experienced a torrential downpour.The rain caused the streets to1and the subway system almost came to a stop.

    Unfortunately, this happened during the morning rush hour.Many people who were going to work were2to go home.Some battled to3a taxi or to get on a bus.Still others faced the4bravely,walking miles to get to work.

    I 5 to be one of the people on the way to work that morning.I went from subway line to subway line only to find that most6had stopped.After making my way7crowds of people,I finally found a subway line that was 8.Unfortunately,there were so many people waiting to9the subway that I could not even get down the stairs to the10.So I took the train going in the opposite direction,and then switch back to the downtown train.Finally,after what seemed like an forever,the train11my stop.Then I had to walk several blocks in the increasingly heavy rain. When I finally got to my office,I was12through,exhausted and13.

    My co-workers and I spent most of the day drying off.When it was 5:00 pm,I was ready to go home.I was about to turn off my computer14I received an email from Garth,my Director:

    I would like to thank all of you who made the effort and15reported to work.It is always reassuring(今人欣慰),at times like these,when employees so clearly show their16to their jobs.Thank you.

    Garth's email was short, but I learned more from that17message than I ever did from a textbook.The email taught me that a few words of18can make a big difference.The rainstorm and the traffic19had made me tired and upset.But Garth's words immediately20me and put a smile back on my face.