高一必备古诗和文言文

下列关于氧气的性质与用途对应不正确的是 A 急病救人——提供呼吸 B登山潜水——提供呼吸C富氧炼钢——金属与氧气反应 D气焊气割——助燃 请说明一下理由啊 还有一个问题 题目中说的 磷燃烧后产生的化学现象? Students can’t take magazines out of the reading-room.（以magazines为主语改句子） 甲乙两种商品的成本共200元,甲商品按30％的利润定价,乙商品按25％的利润定价,后来两种商品都按定价的90％出售,结果仍获利27.7元,请问,甲种商品的成本是多少元?（不要有两元一次方程,要说 火药在历史曾发挥过什么作用?火药的形态及作用现在有没有变化?他的作用和功能有没有被其他物质所取代?快 火药作为一种改变世界的媒体,它起到了什么作用谁能告诉我第一次有热兵器参与的战争是哪次？ 火药的发明使作战方法发生变化,而且对___起作用一定 火药被广泛运用到战争有什么意义 诺贝尔发明火药有什么作用 在一条电车线长为8000米,从起点到终点共设9个电车站,平均每两车站间的距离是（）米 成都至昆明的长途大巴车有哪些线路?起点终点在哪个车站?要多少时间啊? how to translate the sentence?那不能说是经验,只能说是经历. Help how to translate the sentenceBe careful how much you let your intrusive intellect muscle in on territory best dominated by yout gut feelings .Tune in to your body language as you come close to someone of the opposite sex the other sentence,how to translate?These investments now look less attractive in light of recent developments.And if these alternative investments look dicey,diversifying out of US treasuries will require diversifying out of dollars How to translate the following complicated sentence?A very long sentence from the reading comprehension section of TEM8:For seven years he had not confessed for fear of being compelled to be reconiled to Philip,but now he received the offices of the how to translate the sentence of "愁呀愁,愁白了头".i don't know which sentence is accurate and like the native speaker's words,so i ask the friends on the net to vote by ballot and collect the best one.thanks for all friends'answers. 不锈钢菜盆的黑色水锈如何处理 平时吃的面粉或灰面是什么做的?大麦还是小麦? 麦记片是大麦做的吗?怎么做的? you don't know how to write 热固性酚醛树脂持续高温脱水会变成什么样脱水温度在八十左右 树脂应该在一直反应 最后会变成什么样 You don't know how to write. I don't know how to write this composition的中文意思要准确 But （h ） can you?Says her sister you don't know how to write I want to write a letter in English,but I don't know ___ about.A.how to write B.what to write 等不到天黑的烟花不会太完美.这句花的意思是什么?打个比如. 什么花朵比代表祥和的烟花更美丽 烟花与什么花（植物）代表一样的意思? 山上层层桃李花,云间烟火是人家. 怎样才能使小麦粉中a-淀粉酶活性变低呢 烟花的花是什么意思?速度! ,燃烧,加热的区别点燃 ,燃烧,加热的区别 为什么O2加P点燃生成P2O5而不能是燃烧呢请重点回答O2加P点燃生成P2O5而不能是燃烧呢 请回答那是不是O2加P生成P2O5是一点就生成了呢，而不是经过燃烧