Domingo Café, a modern European style. café, is in the （)area.

焊条药皮中加入（)，能增加电弧的稳定性。A.KClB.NaClC.CaF2D.CaO

Which of the following is TRUE about the research conducted by Jose Domingo Villaroel？A．In

I have always liked cafés and ________ in them even now. A caféis an interactive （交

提高钢抗氧化性能最有效途径是加入（)等合金元素。A.MnB.SiC.CrD.AlE.CaF.Cu

下列化合物中 在水中溶解度最小的是（)。 （A) NaF （B) KF （C) CaF2 （D)

Estoy completamente () gracias al café.