The Earth is like our mother.She gives live to all the living things on the Earth.And she provice us with air、food、water and other things we need for living.Once she was beautiful ahd rich.But mow she is crying, becacuse she is becoming dirtier and dirtier, poorer and poorer. It'...
A. Absorbing harmful substances in the air. B. Providing food for humans. C. Providing oxygen for humans. D. Providing shelter for humans. 相关知识点: 试题来源: 解析 A。本题考查植物在生态系统中的作用。植物可以吸收空气中的有害物质,选项 B 是为人类提供食物;选项 C 是为人类提供氧气;选项 D...
百度试题 结果1 题目What can be done to reduce the harmful substances ___ out in the air every day? A. poured B. pouring C. to be poured D. being poured 相关知识点: 试题来源: 解析 D 反馈 收藏
What is water pollution caused by? A. The release of harmful substances into the air. B. The discharge of waste materials into water bodies. C. The dumping of waste on land. D. Only the use of pesticides. 相关知识点: 试题来源: ...
百度试题 结果1 题目What can be done to reduce the harmful substances ___ out in the air every day?相关知识点: 试题来源: 解析 being poured 反馈 收藏
interestedintryingoutCentralAsia,and most well-suitedtotravelersofallbudgets.Foodis cheap,soisgettingaroundusingtheminibuses. Youcanfindhostelsandlocalhomestaysforless than$10.Mealscost$4—$8perday. Romania,$33/day IfyouareplanningaEuropeantripthat?saffordableandalittlebitoffthebeatenpath,Romaniais per...
(2011年3月东北三校联考24题)位于无锡梅村的鸿声钱氏家族,因诞生了“国学大师”钱穆、“力学之父”钱伟长、环保专家钱易、经济学家、物理学家钱临照和工程力学家钱令希等六位院士而蜚声海内外,鸿声钱氏家族也引以为荣。家族的观念自中国古代起就得到了人们的高度重视,主要原因是( )
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At its core, substance abuse is the harmful use of psychoactive substances, including alcohol, prescription drugs, and illegal drugs, that leads to significant adverse effects on health and behavior. According to the World Health Organization, over 35 million people suffer from drug use disorders, ...
However, DES is believed to be a carcinogenic and in many countries, no longer used to fatten up cattle and poultry. FDA approves a number of hormones that can be used for the production of food, which include natural progesterone and testosterone, as well as the synthetics trenbolone acetate...