题型:问答题 The government was believed to be considering _____ a law _____ it a crime to import any kind of weapon.A.to pass …. to makingB.to be passing …. to makeC.passing … made D.passing …. making. 查看答案
题型:问答题 最近发现一种由钛原子和碳原子构成的气态团簇分子,如下图所示,顶角和面心的原子是钛原子,棱的中心和体心的原子是碳原子,它的化学式是( )A.Ti14C13 B.Ti13C14C.Ti6C7D.TiC 查看答案