什么情况下用划线更正法

屠习安619 微生物的实验室培养,既需要为微生物提供合适的营养条件和环境条件,又需要确保无处不在的其它微生物无法混入.请回答下列相关问题: (1)培养基能... -
司往桑15957989307 ______[答案] (1)碳源、氮源、无机盐、水(4分) pH、特殊营养物质、氧气(3分)(2)消毒 灭菌(3)平板划线法 稀释涂布平板法(4)尿素 酚红指示剂 纤维素 刚果红

屠习安619he goes to school on foot(改写句式保持句意)sandy's father goes to work (On foot)括号=下划线(划线部分提问)she does her howework at home (改成否... -
司往桑15957989307 ______[答案] 1.He walks to school 2.How does Sandy's father go to work? 3.She doesn't do her homework at home 4.原句应该是:They go to the funfair every day吧 He goes to the funfair every day 不管原句是什么,把主语变成he ,谓语动词改三单形式就行了 希望...

屠习安619mike takes the underground to school every day?划线提问.takes the underground,用什么疑问词? -
司往桑15957989307 ______[答案] 对画线提问:How does Mike go to school every day?麦克每天是怎样去上学的. 对方式提问用how

屠习安619...boy has many - ________(hobby) 8.This English song is - ________(difficult) to learn than that one. 二.按要求完成下列句子 1.My brother is tall and thin (对... -
司往桑15957989307 ______[答案] 2.more 3.knives 4.third 5.asleep 6.became 7.hobbies 8.difficult 1.How is 2.as tall as 3.didn't clean

屠习安619...strategic location and its importance to so many religions are two of the reasons that the Middle East continue to be a volatile part of the world.处即为划线的正... -
司往桑15957989307 ______[答案] 建议将 has and will 改成 has been and will ,这样句子就通顺了 后面部分译文:中东已经成为,并将继续是世界的不安定地区

屠习安619乳酸菌是一种厌氧型细菌,实验室常利用溶钙圈法对乳酸菌进行筛选,其原理是乳酸菌产生的酸性物质和CaCO3反应而出现的溶解圈,以下为乳酸菌筛选的... -
司往桑15957989307 ______[答案] (1)乳酸菌是厌氧菌,因此用乳酸菌制作泡菜时,用于制作泡菜的泡菜坛要在坛盖边沿的水槽中注满水,其目的是保证乳酸发... 若要进一步纯化乳酸菌,可将挑选出的菌落反复在MRS培养基中划线并筛选. 故答案为: (1)保证乳酸发酵所需的无氧环...

屠习安619在没有限速标志.标线的情况下,如果同方向只有一条机动车道,公路最高限速是多少 -
司往桑15957989307 ______[答案] > 第四十五条 机动车在道路上行驶不得超过限速标志、标线标明的速度.在没有限速标志、标线的道路上,机动车不得超过下列最高行驶速度: (一)没有道路中心线的道路,城市道路为每小时30公里,公路为每小时40公里; (二)同方向只有1条...