题型:问答题 简答题 2008年,全国多处出现婴儿“肾结石”病例报道。经各方调查发现,患儿有长期食用相同品牌奶粉的经历。该奶粉中导致“肾结石”的毒性化学物是A.三聚氰胺B.孔雀石绿C.尿素D.苏丹红E.氯化钙 查看答案
题型:问答题 简答题 Joseph ______to evening classes since last month, but he still can't say "What's your name" in Russian.A.has been goingB.was goingC.wentD.to be has gone 查看答案