题目: 土壤处于什么状态有利于农作物吸收重金属()。A.土壤富含有大量的腐殖质B.土壤的pH值较高,呈碱性C.土壤处于还原状态D.土壤呈酸性状态,pH较低E.土壤富含无机矿物质胶体 答案: 参考答案:D
题型:选择题 In later years, people reported ____ a monster swimming across the lake.A.to seeB.have seenC.seeingD.to have seen 查看答案
题型:选择题 30. He insisted on going abroad to have further study ____ his parents objection.A.by means ofB.in favour ofC.regardless ofD.on purpose of 查看答案