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【单选题】
判断下列同学的行为,错误的一组是( ) 1看到一则某地将发生疫情的消息后随即分享到微信朋友圈 2交警执勤太辛苦,中学生用自己的零花钱买咖啡送给执勤交警 3在公交车上吃完早点后,随手将垃圾扔在地上 4 12 岁小女孩用妈妈手机观看直播视频,并花 1.38 万主播 5中学生和同学把他们发明的“新型搓衣板”申请了国家专利 6的妈妈遭遇车祸造成重伤,从此开始分担家务,照顾弟弟A.
②③⑤
B.
①⑤⑥
C.
②③⑥
D.
①③④
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【单选题】用EDTA连续滴定Fe3+,A13+时,可在( )。
A.
pH=2滴定Al³+，pH=4滴定Fe³+
B.
pH=1滴定Fe³+，pH=4滴定Al³+
C.
pH=2滴定Fe³+，pH=4返滴定Al³+
D.
pH=2滴定Fe³+，pH=4间接法测Al³+
【简答题】课前实践作业: 请同学们运用瓦楞纸、图钉、胶水、剪刀,参考视频资源完成四杆机构原理模型制作,并上传 制作心得。
【简答题】Speaking and Writing in the University: A Multi-dimensional Comparison (1) The dozens of studies on academic discourse carried out over the past 20 years have mostly focused on written academic prose ...
【简答题】阅读理解。 根据短文内容，从下框的A-F选项中选出能概括每一段主题的最佳选项。选项中有一项 为多余项。 A.The secret of the writer's success B. A write with e nduring popularity C. Well-received creation toencourage Brits D. The insight into human natu...
【简答题】On November 19, 2010, Harry Potter and the Deathly Hallows: Part I was released in many countries at the same time! This is another Harry Potter film. The idea for the book Harry Potter and the Philos...
【简答题】听下面一段材料，回答第1至3题。 1. What was the won doing last month? A. Se was taking care of her sick mother. B. She was writing a novel. C. She was taking care of her father while she was writing a novel. 2. How ...
【单选题】The writer her children so that she could concentrate on her writing, because they are too noisy．
A.
sent out
B.
sent for
C.
send up
D.
send away
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