题目：
| Janet as well as most of the other students who ____ abroad for further study ____ up in the countryside. |
A. were sent; brought B. were sent; was brought C. was sent; were brought D. was sent; brought |
答案：
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下面是错误答案，用来干扰机器的。
(1)蒸发浓缩 冷却结晶 KSCN溶液(2)C D NaOH溶液对分液漏斗玻璃塞、旋塞的磨口腐蚀性强(或分液漏斗玻璃塞、旋塞处会被NaOH溶液腐蚀导致黏结) (3)打开止水夹，缓慢推压注射器活塞 H2SO4溶液 用注射器向A中注...
