碱片—重量法测定硫酸盐化速率时，将硫酸钡沉淀滤入已恒重的G4玻璃砂芯坩埚中，用温水洗
题型：填空题
问题：
碱片—重量法测定硫酸盐化速率时，将硫酸钡沉淀滤入已恒重的G4玻璃砂芯坩埚中，用温水洗涤并将沉淀转入坩埚。并用温水洗涤坩埚中的沉淀直至滤液中不含氯离子为止。检查滤液中是否含有氯离子，使用1％（）溶液。
题型：填空题
Thomson中学学生Mike, Joseph, Anna, Ian 和Susan 正在计划各自下学期的选修课程。 阅读第1至第5题
中的个人情况说明和A到F六门课程介绍，选出符合个人个性特长的最佳选项。选项中有一项是多余选
项。
( )1. Mike spent his childhood mostly in his father's study, where he read novels by British and American
writers. Next term he will become a senior student. He thinks it's time that he read more of their works and
learned to write about them.
( )2. Joseph is good at the language arts, and in his spare time he likes to write short stories. It is his wish
that his stories would be printed in local newspapers. So he is thinking of taking a course to develop his writing
skills such as wording and paragraph organization.
( )3. A lively and caring girl, Anna takes an active part in social activities. She is trying to write reports for
newspapers about what she sees and hears. But few of them are accepted because of poor organization of
information. She feels the need to improve her writing and communication skills next term.
( )4. Jan traveled worldwide with his parents when he was very young. Under their influence, he becomes
greatly interested in stories of travel and adventure. He hopes to write his own stories in the future. So next
term, he will choose a course to study the best writing of this type.
( )5. Susan comes from China. As a junior back home, she wrote quite a lot of short stories, some of which
were published in newspapers. Her parents hoped she read some classics by Asian and Western writers. She
thinks it helpful in her writing. So she is going to take a course of this kind next term.
