【单选题】We are glad to have _______ the transaction with you.
【简答题】We are glad to have you with us today, and it is our sincere hope that you will join us in this unique exchange of ideas. 2、公司在报上登广告招聘电子方面的专家。 3、酒吧间只有五个顾客还没走。 4、贵公司管理体制还不完善。
【单选题】We are glad to you that we have shipped the required goods.
【单选题】按照酸碱质子理论,下列物质中不属于两性物质的是
【多选题】根据酸碱质子理论,凡是能给出质子(即H + )的分子或离子都是酸,凡是能结合质子的分子或离子都是碱。按照这种理论,下列微粒属于两性物质的是()。