题型:选择题 The new dictionaries are very useful. They _______ well and _______ already. A.sell; have been sold outB.sold; had sold outC.sell; sell outD.are sold; have been sold out 查看答案
题型:多项选择题 下述关于乳酸的叙述正确的是()A.乳酸是葡萄糖无氧酵解的产物 B.体内乳酸产生的主要部位是骨骼肌、脑、红细胞和皮肤 C.乳酸的代谢清除的主要部位为肝脏和肾脏 D.乳酸只在肝脏代谢清除 E.肌肉不参与乳酸的代谢 查看答案