题干

下列说法正确的是(   )

A:卢瑟福通过α粒子散射实验提出了原子的核式结构模型

B:结合能越大,原子核结构一定越稳定

C:如果使用某种频率的光不能使某金属发生光电效应,则需增大入射光的光照强度才行

D:发生β衰变时,元素原子核的质量数不变,电荷数增加1

E:在相同速率情况下,利用质子流比利用电子流制造的显微镜将有更高的分辨率

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答案(点此获取答案解析)

A,D,E

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         Who do you think was the most important woman of the past 100 years?

         Jane Addams(1860—1935)

         Addams helped the poor and worked for peace. She created shelters, education opportunities and services for people in need. In 1931, Addams became the first American woman to win the Nobel Peace Prize.

         Rachel Carson(1907—1964)

         Rachel Carson was born in the rural river town of Springdale, Pennsylvania in America. The popular 1962 book SilentSpring by Rachel Carson made people realize the dangers and the harmful effects(影响) of pollution on humans and on the world's lakes and oceans.

         Angela Merkel(1954—)

         In 2005, Germans chose Angela Merkel as their first woman head of the country. She had been a scientist in the past. As Germany's leader, she has had an effect on the whole world.

         Sandra Day O'Connor(1930—)

         When Sandra Day O'Connor finished her class at Stanford Law School in 1952, she could not find work because she was a woman. However, she became the first woman to join the US Supreme Court(最高法院) in 1981 after years of hard work.

         Margaret Thatcher(1925—2013)

         In 1979, Margaret Thatcher became Britain's first woman Prime Minister(首相). She served until 1990, which made her the first British leader to serve three terms in a row. Because of her high standards and strong will, people called her Britain's “Iron Lady”.

          Marie Curie(1867—1934)

         Polish­born scientist Marie Curie discovered that some types of metal give off energy called radiation(辐射能). Her research led to new medical treatments and arms. She received the Nobel Prize in Physics in 1903 and in Chemistry in 1911.