问题
填空题
常温下将0．01molCH3COONa和0．004mol盐酸溶于水，配成0．5L混合溶液。
（1）溶液中共有________种微粒。
（2）溶液中有两种微粒的物质的量之和一定等于0．01mol，它们是____________。
答案
（1）7
（2）CH3COOH和CH3COO-
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常温下将0．01molCH3COONa和0．004mol盐酸溶于水，配成0．5L混合溶液。
（1）溶液中共有________种微粒。
（2）溶液中有两种微粒的物质的量之和一定等于0．01mol，它们是____________。
（1）7
（2）CH3COOH和CH3COO-
| 完形填空。 | ||||
| Rick goes to Boston ___1___ a meeting. The meeting is in Prince's Building on ___2___ Street, and Rick wants to be there on time. However, it is Rick's first time to visit the city, ___3___ he doesn't know his way around. When he sees an old couple sitting on a bench, he goes up to ask for ___4___. The couple kindly tell Rick to ___5___ the underground and to get ___6___ at Prince Station. Rick follows their direction, gets off at Prince Station and walks east for two blocks. An hour later, he is disappointed (失望的) to find that he is ___7___ 41st Street, not 44th Street. The ___8___ misheard (听错) him and gave him the ___9___ direction. Another hour later, when a policeman takes him back, he sees the old couple again. They are still ___10___ on the bench, right in front of Prince's Building. | ||||
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