My good friend Rose went to the party with her husband, ________ a happy evening of wine,
food and song.[ ]
A. expecting
B. to expect
C. expected
D. having expected
答案:A
My good friend Rose went to the party with her husband, ________ a happy evening of wine,
food and song.[ ]
A. expecting
B. to expect
C. expected
D. having expected
答案:A
有一瓶在空气中放置久的氢氧化钠溶液,虽仍然澄清透明,但已部分变质.请你用3种不同的化学方法进行验证,按要求填写下表:
方法 | 所用试剂 | 反应的化学方程式 |
① | ______ | ______ |
② | ______ | ______ |
③ | ______ | ______ |