问题 计算题 解方程(1)7x -3x =8.8(2)10x+45 ×8 =870(3)5×(x-12)=15 答案 (1)7x -3x =8.8 x=2.2(2)10x+45 ×8 =870 x=51(3)5×(x-12)=15 x=15 选择题 There was a________look on his face when he met with the________problem.[ ]A. confusing; confusing B. confused; confusedC. confusing; confused D. confused; confusing 查看答案 单项选择题 当乳母患有下列哪种微量元素缺乏症时,其乳汁对婴儿有毒,甚至可致吸吮乳汁多的乳儿突然死亡( )。A.维生素CB.维生素DC.维生素AD.维生素B1E.微量元素锌 查看答案