如何测试水的ph值

根据首字母完成句子1\The piano is a kind of m( ) instrument.2\Every year,water sports,e( ) swimming and surfing,attact large numbers of tourists to the island. 什么叫兄弟?什么叫亲情?现实的社会,已经把这几个字的意思修改了吗?在利益面前,兄弟可以反目,10多年,几十年的兄弟情,就这样打了一个句号.我哥经常看到的就是自己的辛劳,老婆的辛劳,而自 兄弟亲情的成语兄弟姐妹加把劲啊! 关于同源染色体及等位基因同源染色体 是指 在间期复制前 两条染色体 还是间期后复制完毕的具有4条染色单体的一对同源染色体?等位基因：是否一对同源染色体上可以有表现不同性状的等 英语作文, 求写英语作文. 英语翻译 补充成排比句“当人们指点、欣赏荷花时,荷叶（ ）” Ms Gao,_____my mother.Mum,_____Ms Gao. A:this is;this is B:she is;this is C:she is;she is The sign on the building in the park mean"Danger".错在哪? 空山鸟语是一篇描写什么的文章? There's a sign on the wall .It ____"Don't touch."选择A：meansB：meanC：is 学霸们英语作文怎么写? 一、反义疑问句They will be here tomorrow,（ ）（）?These men arrived yesterday,（）（）?That old man （ ）retired yet ,has he?（为什么has he划线）She （） leaving when you came,wasn't she?（最后两个还划线）You can c They will be arriving here tomorrow.能不能改成：They are going to arrive here tomorrow. 让某一品系的红果番茄自交,F1中有红果番茄也有黄果番茄(遗传因子用R和r表示).若让F1中红果番茄种植后随机交配,F2中各种遗传因子的组成比例是多少? 英语填空!we can often see these words_____ (write) on the wall of the library "be quiet pleaswe can often see these words_____ (write) on the wall of the library "be quiet please" 连词成句 teacher,is,in,our,English,library,the(.) Read the story book in class改为否定句 keep,in the library,quiet,please连词成句 英语缩写I'll是什么意思?I'll ENGLISH it will 缩写it'll 怎么读? 像've,'re,'ll,'d 这样的英语缩写应该怎么发音呢? 怎么用键盘打出英语音标? 怎么样打出像“3”的那个英语音标?最好打出来! As we all know,time is more important than money.We will take part in the entrance examination to senior high school next year.So we must concentrate on study now.However,some of the student are always wasting time.They often spend more time playing 求英语作文学霸请来假设你是Emille,要为Frandy开一个派对,庆祝他四十岁生日,邀请朋友Anna和Sam来参加,时间是下周六,十一月七日晚上六点,地点是名为Sunward Fishery Restant的餐厅.2013年11月1日,你给 The sign means danger.改为一般疑问句_____ the sign _____ danger? the sign means“ ”（danger）.填什么,为什么 I'd love to 中I'd是I ____的缩写、快点, I'd love to .I'd是什么的缩写啊 意思是什么啊 the sign means “no litttering“（一般疑问句） OK,I’d love it