皮皮学，免费搜题
登录
搜题
【单选题】
用PbS作共沉淀载体,可从海水中富集金。现配制了每升含0.2mg Au3+的溶液10 L, 加入足量的Pb2+,在一定条件下,通入H2S,经处理测得1.7mg Au。此方法的回收率为A.
80%
B.
85%
C.
90%
D.
95%
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Which of the following is NOT the learners' individual factor involved in background information of lesson planning?
A.
Age range
B.
Social background
C.
Height range
D.
Interests
【单选题】Which of the following is NOT true according the related background in A Lesson in Living ?
A.
Humpty Dumpty is a character in an English language nursery rhyme.
B.
Pride is not included in the Seven Deadly Sins according to the Holy Bible .
C.
Beowulf is the hero of the long poem of the same name “Beowulf”.
D.
Oliver Twist is a hero in the novel of the same name by Charles Dickens.
【简答题】此去经年, 。《雨霖铃 柳永》
相关题目：