题型:判断题 The school built a new lab; now they need to buy _____.A. some new equipmentsB. several new equipmentsC. some new equipment D. several new equipment 查看答案
题型:判断题 (5分)下图是某同学在做“观察叶片的结构”的实验时所看到的菠菜叶横切面,请据图回答:(1)[①]、[⑤]_______________属于保护组织,[②]、[④]应属于________________组织。(2)光合作用需要的水分、无机盐运输到叶肉细胞是通过[_____]叶脉实现的。(3)气体出入的门户是[ ]____,它是由一对___________细胞控制的。 查看答案