题目

核聚变发电有望成为解决人类能源问题的重要手段之一、氘( )是核聚变反应的主要原料，下列有关叙述正确的是（） A . 的中子数为2 B . 的核电荷数为1 C . 是自然界中最轻的原子 D . 是氢元素的一种同素异形体 答案：B    Many years ago,there was a family called Franklin. They lived in Boston. There were five girls and boys in the family. One day in January,1760,another baby was born. The boy’s mother and his father gave the boy a name-Benjamin.    Benjamin was the most clever of all the children. He could read when he was five and he could write by the time he was seven. When he was eight he was sent to school.    In school Benjamin was good at reading and writing but weak in Maths. He read all of his father’s books. And whenever (无论何时) he had a little money,he bought a book with it. He liked books. They told him how to do something. At that time he invented (发明) the paddles (脚蹼) for swimming.NameBenjamin FranklinDate of birth(1)， 1760Place of birthBostonFamily members(2) brothers and sistersChildhoodHe was the (3) of all the children in his family.   He could read when he was (4) years old. He was able to (5) at the age of   sevea He started to go to (6) at 8 years old. In school, he was good at (7)   and writing, but not at (8).What he didHe read all his father’s books. He bought (9)   with all his money. He invented the paddles for (10).1. 2. 3. 4. 5.6. 7. 8. 9. 10.