夜深了,他还在做课外作业.It was late at night and he was still working away at his homework.比尔坐着空想,他母亲要他面对现实,去做课外作业.Bill was sitting and daydreaming so his mother told him to come down to earth and to do his homework.老师给了我们十道数学题作为课外...
External application of oil: Demodex folliculorum hominis infection, as in rosacea.油外用可治皮肤毛囊蠕型螨感染 ﹐ 如酒渣鼻.Human Demodex is a small permanent parasite which can cause human demodicidosis.人体蠕形螨是一类小型永久性专性寄生螨,可引起人体蠕形螨病.Human ...
The preparation of catalysts , yield of glyceryl triacetate and and demerits the catalysts were introduced briefly.对上述催化剂制备、三醋酸甘油酯收率、催化剂优缺点作简要介绍.This paper analyzes the glyceryl polyether by nuclear magnetic resonance ( ...