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【简答题】
Make a short speech about the questions: 1. How important is food in your life? Do you "eat to live" or "live to eat"? 2. Do you agree if something tastes great, it's probably bad for you? Upload your audio file.
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【简答题】Wang Yang gets up late. He rides his bike to school quickly(飞快地). He doesn’t look at the traffic lights, so he hits(撞) a car. The driver takes him to hospital. The doctor is very careful to look over ...
【多选题】Wang Yang wants to join the Art Club. He can .
A.
sing
B.
dance
C.
paint
D.
play the piano
【单选题】Wang Yang wants to join tne Art Club. He can____
A.
paint
B.
painting
C.
paints
D.
painted
【简答题】阅读理解 Mr Wang comes into Class Three. The bell is ringing. He wants to teach English lesson. Mr Zhang comes and asks him to go to the head's(校长) office. He must go to have a meeting. Mr Wang says...
【简答题】转盘的结构主要有___ 、转台总成、制动机构和壳体等。
【单选题】采用外加热重铬酸钾容量法测定土壤有机质含量时，通常采用的反应条件是（）
A.
油浴220~230 ℃，沸腾5 min
B.
油浴170~180 ℃，沸腾5 min
C.
沙浴220~230 ℃，沸腾10 min
D.
水浴90~100 ℃，保温30 min
【单选题】Listen and choose 听录音,选择正确答案。 John wants to speak to ___________.
A.
Tang Hua
B.
Sara
C.
Wang Yang
【多选题】采用外加热重铬酸钾容量法测定土壤有机质含量时，如果（）说明氧化反应可能不完全，应弃去重做。
A.
油浴后的溶液为黄色或黄中稍带绿色
B.
油浴后的溶液以绿色为主
C.
滴定时消耗FeSO 4 溶液的体积大于空白用量的1/3
D.
滴定时消耗FeSO 4 溶液的体积小于空白用量的1/3
E.
滴定时消耗FeSO 4 溶液的体积大于空白用量的1/2
【简答题】采用外加热重铬酸钾容量法测定土壤有机质含量时，如何判断氧化反应是否进行完全？
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