题型:名词解释 ------I have just had my watch repaired.------How much did they ____ for that?A.costB.chargeC.spendD.pay 查看答案
题型:名词解释 渗漉法提取时,影响渗漉效果的因素是()A.与渗漉柱高度成正比,与柱直径成反比B.与渗漉柱高度成反比,与柱直径成正比C.与渗漉柱高度成反比,与柱直径成反比D.与渗漉柱高度成正比,与柱直径成正比E.与渗漉柱大小无关 查看答案