问题
单项选择题
长期大量服用可引起肝脏肿大，肾脏损害的维生素是（）
A．维生素A
B．维生素B1
C．维生素C
D．维生素D
E．维生素E
答案
参考答案：D
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长期大量服用可引起肝脏肿大，肾脏损害的维生素是（）
A．维生素A
B．维生素B1
C．维生素C
D．维生素D
E．维生素E
参考答案：D
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| All over the world people swim for fun. Swimming is enjoyed by people of __1__ ages, from the very young to the very old. There are many places for people to swim in swimming pools. Many schools, hotels and clubs have swimming pools. Some people have pools of _2 _in their yards. Swimming is one of __3__ forms of exercise. It can __4___ hearts and bodies strong. It can also help blood circulate(循环). Handicapped people can keep their bodies in better condition by swimming __5_ _ they can't enjoy sports. __6__ is a good idea for parents to see to it(务必做到) that their children learn to swim ___7__ an early age. So their children will ___8___ it for the rest of their lives. There are many rules for water safety. These rules can help save not only your life ___9___ the life of a friend. First of all, know __10__ . Many schools __11 __ swimming lessons to children. Adults(成人) can learn to swim at public pools. __ 12 __ rule to remember is never to swim __13__ . Always swim with a friend and know __14__ in the water at all times. It is best to swim __15__ in safe places if you are beginners. If every one learned to swim and obeyed the rules for water safety, most drawing(溺水) could be avoided. | ||||
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