问答题简答题：无公害茶叶、绿色食品茶和有机茶的概念和异同点。

题型：问答题简答题

下列实验的现象描述或对应的离子方程式不准确的是（　　）

A．氯化亚铁溶液中慢慢滴入过量氨水，产生白色沉淀：Fe²⁺+2NH₃•H₂O=Fe（OH）₂↓+2NH₄⁺

B．氢氧化铁胶体中滴入足量HI溶液，先产生红褐色沉淀，后沉淀溶解变成棕黄色溶液：Fe（OH）₃+3H⁺═Fe³⁺+3H₂O，2Fe³⁺+2I^-═2Fe²⁺+I₂

C．明矾溶液中逐滴滴入氢氧化钡溶液产生白色沉淀，并不断增加：2Al³⁺+3SO₄^2-+3Ba²⁺+6OH^-═3BaSO₄↓+2Al（OH）₃↓，2Al（OH）₃+SO₄^2-+Ba²⁺+2OH^-═BaSO₄↓+2AlO₂^-

D．澄清石灰水与少量小苏打溶液混合，产生白色沉淀：Ca²⁺+OH^-+HCO₃^-═CaCO₃↓+H₂O

查看答案

完形填空。
Tom bought shoes from the shoe factory and tried to sell them to other people. There were not many 1 in the small villages. People there didn't 2 to go to town to buy shoes" So Tom 3 a lot of shoes there. One day Tom 4 along the street. He stopped in front of a house. There was a small boy beside the door. Tom 5 the window of his lorry (货车) and asked the boy, "Is your 6 at home?" The boy looked at Tom and answered," Yes, she is. " "That's 7 " Tom said. He got off his lorry, look some 8 and went to the door of the house, He knocked at the door and waited for a few 9 , but nobody came to open the door. Tom knocked again, but still noon answered. Tom looked at the boy and said angrily, "Your mother is not at home!" "She is!" the boy said. "Why didn't she open the door?" Tom asked. "This isn't 10 house," the boy shouted.
( )1. A. shops ( )2. A. know ( )3. A. made ( )4. A. moved ( )5. A. opened ( )6. A. father ( )7. A. well ( )8. A. dresses ( )9. A. hours ( )10. A. your	B. towns B. want B. showed B. passed B. cleaned B. mother B. bad B. flowers B. days B. their	C. villages C. went C. sold C. went C. found C. brother C. good C. jeans C. minutes C. my	D. stops D. think D. bought D. drove D. closed D. sister D. happy D. shoes D. weeks D. his

无公害茶叶、绿色食品茶和有机茶的概念和异同点。