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【多选题】
用重量法测定 SO42-含量，BaSO4沉淀中有少量Fe2(SO4)3，则对结果的影响为( )。A.
正误差
B.
负误差
C.
对准确度有影响
D.
对精密度有影响
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
【单选题】第一节 听下面5段对话。每段对话后有一道小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 听力原文：W: The football team has already won first place in two competitions. And there will be another...
A.
The football players have done very well.
B.
The next competition starts this week.
C.
The team needs more experience.
【单选题】In order to expose corruption, they have decided to set up a special team to______ the company's accounts.
A.
search for
B.
work out
C.
look into
D.
sum up
【单选题】教师根据幼儿的日常对话“我手套上的图案比你的漂亮”来设计美术活动,体现了什么原则?
A.
根据幼儿的生理特点选择材料开展活动
B.
根据幼儿的实际运用能力来选择材料开展活动
C.
从幼儿的兴趣出发，选择与生活密切相关的材料来开展美术活动
D.
灵活使用不同绘画工具和材料展现绘画内容
【简答题】Why was the man relieved at last? [A] Because the telegram was a false one. [B] Because this telegram was not addressed to him. [C] Because his uncle wash't ill at all. [D] Because it was somebody els...
【单选题】从社会的角度来看,效率要求( )。
A.
社会边际收益等于社会边际成本
B.
社会边际收益等于私人边际收益
C.
社会边际收益等于私人边际成本
D.
社会边际成本等于私人边际收益
【单选题】The Kings have been to Tibet. They have decided to go there next year.
A.
never
B.
ever
C.
already
D.
yet
【简答题】That's the (第一) week in August
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