以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 proparediol acetal was synthesized by using stannous chloride as catalyst.以非质子酸氯化亚锡为催化剂,催化合成了丁醛-1,2-丙二醇缩醛.Butyraldehyde 1,2 propanediol acetal was synthesized by using st...
有一扇饰有家族盾形纹章的彩色玻璃窗。There was a stained-glass window with the family coat of arms.壁炉架旁边有一把印有纹章的小椅子.There was a little heraldic chair by the chimney - piece....
The shadow which they bear in their glance denounces them.他们目光中的那种遮遮掩掩的神情才会把他们揭露出来.Customer service is domestic network game all the time most the problem that denounces.客服一直是国内网络游戏最遭诟病的问题.Schlamm denounces dialectics an...
Can Mr. Frith buy the television on instalments?弗里斯先生可以用分期付款的方式购买电视机 吗 ?Can Mr. Frith buy the television on instalments? How does it work?费里斯先生能用分期付款方式购买电视机 吗 ?如何操作 呢 ?He teamed up with Frith and Mullen for the Chuchi fi...