【名词&注释】
花粉粒(pollen grain)、电磁波(electromagnetic wave)、可见光(visible light)、红外线(infrared)、雄配子体(male gametophyte)、卵细胞(egg cell)、雌配子(female gamete)、国会议员
[单选题]子叶出土的幼苗是种子萌发时由于( )的结果。
A. 上胚轴伸长
B. 胚芽伸长
C. 胚轴不伸长
D. 下胚轴伸长
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举一反三：
[单选题]卵细胞(egg cell)是雌配子(female gamete)，成熟的花粉粒是雄配子。( )
A. 正确
B. 错误
[单选题]关于电磁波，下列说法正确的是
A. 雷达是用X光来测定物体位置的设备
B. 使电磁波随各种信号而改变的技术叫做解调
C. 用红外线照射时，大额钞票上用荧光物质印刷的文字会发出可见光
D. 变化的电场可以产生变化的磁场
[单选题]BWhen people hear a president speak, they seldom think about others helping to shape the presentation（报告）. Today, however, presidents depend on writers such as J. Terry Edmonds to help them communicate（交流）effectively. Edmonds is the first African American ever to work as a full-time speechwriter for a U.S. president; he is also the first African American to serve as director of speechwriting for the White House. His is an all-American story of success.
A. Edmonds grew up in Baltimore, Maryland; his father drove a truck, and his mother worked as a waitress. A great reader, Edmonds showed a gift for writing at his high School, Baltimore City College. After graduating in 1967, Edmonds went on to Morgan State University.
B. Edmonds began his career in business, with jobs in public relations and communications, He joined the world of politics as news secretary for his congressman (国会议员) from Baltimore, During Bill Clinton’s presidency, he worked speeches for Health and Human Services Secretary Donna Shalala and worked in a number of jobs in the White House and in governmental departments. President Clinton then appointed (任命) him to the office of director of speechwriting, Following the 2000 elections, Edmonds returned to Morgan State University as the school’s special assistant to the president for 2001-2002.
C. 45. Which of the following statements is TRUE according to the text?
D. Edmonds proved himself to be good at writing at high school.
E. Edmonds graduated from Morgan State University in 1967.
F. Edmonds was the first full-time speechwriter.
G. Edmonds served the White House after 2000.
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