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【单选题】
“先生书策琴瑟在前,坐而迁之,戒勿越”讲的是()A.
子女对父母之礼
B.
弟弟对兄长之礼
C.
长辈对晚辈之礼
D.
学生对老师之礼
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【单选题】听力原文：M1: Jack, when you are done with the paper, can I read it? I need to check something in it. M2: Here, you can take it, Peter. I'm done with it. Oh, by the way, how is Carol working out in her new...
A.
Jack's promotion to a managerial position.
B.
How a co-worker is adjusting to a new position.
C.
What to do about one of the team members who is not doing a good job.
D.
Where to place a shy worker who is new to the company.
【简答题】什么叫基准物质?作为基准物质必须具备什么条件?标定碱标准溶液时,邻苯二甲酸氢钾(KHC8H4O4,M=204.23 g·mol-1)和二水合草酸(H2C2O4·2H2O,M=126.07g·mol-1)都可以作为基准物质,你认为选择哪一种更好?为什么?
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