题目

高一寒假作业、英语,化学,生物
单句改错
1、We have discussed the problem for quite some time,but haven't been reachel any conclusion yet.
2、Tomisn't here.He has been to the library.
3.The couple had married for nearly 40 years before the husband died last year.
4.Rock music is popular by young people.
5.This is a good way of studay English well.
句型转换
1.The reason why he took Swiss nationality in 1901 is still a questiong.
____ he took Swiss nationality in 1901 ____ ____ ____.
2.When and where for them to hold the meeting has not yet been decided.
____ ____ ____ ____ will hold the meeting has not yet been decided.
3.It is important that we should make full use of our time.
____ ____ ____ important _____ ____ ____ make full use of our time.
4.Dreams are different from reality.
Dreams ____ ____ reality.
5.He burst into rears on hearing the news.
He ____ ____ ____ on hearing the news.
有ABCDE五种化合物,其中ABCD是含铝元素的化合物,F是一种气体,标况下相对于空气的密度是1.103.他们之间的转化关系为下
1.A+NaOH--D+H2O 2.B--A+H2O 3.C+NaOH--B+NaCl 4.E+H2O--NaOH+F
(1) 写出ABCD的化学式
（2）写出1.和4.的离子方程式
从一种生物的细胞中提取得到甲乙两种有机物,甲的含量大于乙,在适当条件下用人的胃液处理,甲分解而乙不分解,分析甲乙的化学成分,甲含有氮和硫,乙含有氮和磷,甲乙两种物质遇碘都不变蓝,从来源看,在细胞膜上有甲而没有乙.请回答
（1）根据以上叙述可知,甲属于_________类物质,乙属于__________类物质
（2）甲在适当条件下,用人的胃液处理后能分解,是胃液中的_______在起作用
（3）在物质乙的结构单位中,N主要存在于_________部分

提问时间：2021-02-13

答案

没问题!但是我不知道我的回答对你有多少的帮助!我尽量!单句改错：1 time改为times 2 been改为gone 3had被去掉 4 by改成with5 study改为studying句型转换:1 untill is a question 2 whenever and wherever they3 it i...