线性代数正惯性指数怎么求

Let's （ ） baseball.是play还是playing It’s for play baseball.(改错) 英语句子改错：jane likes play the baseball. "LOVE猫猫,永远的唯一"英语怎么说 What are some of the common crimes in our life now?要答案不要翻译! School Basketball Team（英语短文解答）School Basketball Team Peter,Jack,Sam and John are members of the School Basketball Team.It is one of the most popular teams in our city.They're going to play against No.9 Middle School Basketball Team fr I like basketball.I am ___ the school basketball team ( )Tim _____ the school basketball team for three weeks.( )Tim _____ the school basketball team.( )tim _____the school basketball team activities.a.has jioned b.has jioned in c.has been d.has beenon linda and mary visitm their teacher yesterday.找出句子中的错误 Sam and Tom Visit their teacher yesterday Who helped him___the classroom yesterday?Mary and Linda.是用原型吗A clean B cleaned C cleans 组句 Mary linda and at the dairy at the dairy be the day before yesterday Mary Linda and at the dairy be the day before yesterday (连词成句） e_____to cross the river by boatIt's e_____to cross the river by boat急急急! The students cross the river on a ropewayThe students cross the river on a ropeway every day,but they aren't（ ） A.quick B.gets C.leaves D.comes i was ____to find ____expression on his face .A.surprising exciting B.surprised excited Csurprising excited D.surprised exciting 求语法讲解 I was( ) to find an ( )expression on his face.A.surprising,exciting B.surprised,excitedC.surprising,excited D.surprised ,exciting Eat vegetables fruits You should eat some vegetables and fruits .用fruit 还是fruits. My family have five people.My family has five people.哪个正确 ___ ___ ___ eat lost of fruits and vegetables.多吃水果和蔬菜是有好处的. There are five people in my family.同义句转换 I have__ __ __ five. I have a happy family.There are people in my family.My father,my mother and I.My father works in a hospital.his work is ver important.he work hard.my mother is a teacher.she teacher english.she is ver busy.After work,she does housework at home.My mot They cross the river ---------.A.by a ropeway B.in a ropeway C.on a ropeway D.at a ropeway Mary has lost her pen.have you seen it here and there?请问：为什么是用‘’have you seen‘’ 而不是‘’do you see‘’提问呢? 英语翻译这应该是英语中一条常用口语吧?不是直接翻译成“你失去它了吗?” 狗喜欢骨头,但猫喜欢鱼(英语) 猫喜欢吃鱼和老鼠的英语怎么写? 我经常用鱼喂我的猫用英语怎么说 根据中文意思和英文提示词,写出意思连贯、符合逻辑的英文文段.给的英文提示词必须都用上,中文不必全译自行车在北京很受欢迎,骑车上学或上班都很方便.如今越来越多的人……这使得… “赛”把底下的“贝”去掉换成“足”念什么? 找单音节的英文名,特殊点的,