求向量a垂直b

1.it is nearly as cold today as yesterday.the temperature is only a degree___ zero .有以下选择.A.above B.about C.over D.across谢谢啦, When the temperature is below zero,the water will f____ . what temperature is it today?和what is the temperature today?都可以么?what temperature is it today?和what is the temperature today?我两个都查到了.是不是都是正确的?还有比如说what temperature is the water?what's the temperture Yesterday the temperature dropped to 8 below zero.8 below zero 这里的zero 是温度的°的意思吗?8°以下? 请问 be different from 这个短语在句子中通常做什么成分,different做表语吗,from后面的部分做什么成分 Many people who live in cities say that they.在线等...快啊..不是翻译。。是这个文章全文。。。 who i_____ this kind of bicycle补充单词（开头字母已给出 This kind of bicycle sells____?A.good B.well C.nice D.fine railway什么意思 The( )(车辆）is very heavy when people are on the street health is more important to me than m_____.B careful it's d____ to run across the street now. People are really very r_.He is k_of heavy. be careful to look both sides of the street before you across it.那里错了,请改正! Be careful _____ the street.A.crossing B.cross C.across D.to cross 为什么选D Be careful _____ the street.A.crossing B.cross C.across D.to cross 选择哪个 为什么 I don't think you are very good! the more i learn aboutchinese i live in china中间空a,the happier b,the more happy c the most happily 请问填什么 Must l hard in this paper one hoMust l hard in this paper one hour later Yes,you——A need B must C may D will This tooth must come They are playing basketball.图片上有三个小孩在跳舞.They are playing basketball.怎么改 Good manners are very important in the communication of daily life.的意思 这个题选什么---Whose exam paper is it?---Whose exam paper is it?---It ___be Li lei's.He always forgets to write his name.A.can't B must C.shouldn't D may以及为什么呢 it____be LiLei's.He always forgets to write his name on it.a.must b.may exam paper是否可数我要说 我收集考卷应该怎么说? pilot paper 是什么意思(对应的有exam paper,answer paper) I can learn a lot about history.I can learn about Chinese history a lot这两句哪个对?如果都不对怎样修改？ My father is enjoying the afternoon tea at home now.at home划线提问 His father's name is Mike.怎么变成一般疑问句? lt is an orange（用lime改选择疑问句） My father can dive(用drive做选择疑问句）额···继续···the monkeys like peaches(用grages该选择疑问句）he does his homework at home(用at school改选择疑问句）the every person has _____dream.My dream is to work in ___university 意思：1.the first day of the new term 2.a middle school 3.read better than all of us many people help ___ ___ ___ ___(流浪者找工作）