优课网
首页
数学
语文
英语
化学
物理
政治
历史
生物
首页
> 若=0,则一定有[]A.a=0B.b=0C.a=b=0D.a=0或b=0-七年级数学
若=0,则一定有[]A.a=0B.b=0C.a=b=0D.a=0或b=0-七年级数学
题目简介
若=0,则一定有[]A.a=0B.b=0C.a=b=0D.a=0或b=0-七年级数学
题目详情
若
=0,则一定有
[ ]
A.a=0
B.b=0
C.a=b=0
D.a=0或b=0
题型:单选题
难度:偏易
来源:同步题
答案
B
上一篇 :
下列等式变形,正确的是[]A.x2=2
下一篇 :
若,则=()。-八年级数学
搜索答案
更多内容推荐
从框里选择填入对话相应空白处。(10分)A. How much is it? B. What size do you want?C .What time is it? D .OK. I’ll take
—Hi, Mike! Nice to see you.—_______A.How do you do?B.Nice to see you, too. C.I’m fine.D.OK.-九年级英语
若,则=()。-八年级数学
如果ab=mn,那么下列等式不成立的是[]A.B.C.D.-八年级数学
A: Hi, Alice. I haven’t seen you for three years. What are you doing here?B: Hi, Bob, it’s you, my o
单词辨音 找出所给单词划线部分读音不同的单词。(5 分)小题1:A.animalB.manyC.blackD.glad小题2:A.enjoyB.everyoneC.cleverD.help小题3:A.
若(a-b):(a+b)=3:7,则a:b=()。-九年级数学
下列各方程,变形正确的是[]A.=1化为x=B.1-[x-(2-x)]=x化为3x=-1C.化为3x-2x+2=1D.化为2(x-3)-5(x+4)=10-七年级数学
听短文,补全方框中句子。Found: Is this your 1___________? Please call 2__________. Phone 136-2087 Lost: My 3____
录音中有一段对话,听对话两遍,然后从每小题A、B、C中选出能回答所给问题的正确答案。1. Where does Maria want to go with her father?A. To the p
录音中有10组对话,每组对话听两遍,然后从每小题A、B、C中选出能回答所给问题的正确答案。1. Who cooked dinner?A. Jim. B. Maria.C. Maria's p
录音中有10个句子,每个句子听一遍,然后从每小题A、B、C中选出能对每个句子做出适当反应的答语。( )1.A. Yes, they are. B. No, it isn't.C. That&
听对话及问题,选择正确答案。每组对话及问题读两遍。( )1.A.Music. ( )2.A.The girls. ( )3.A.One. ( )4.A.He asks her to come earl
听句子,选择正确答语。每个句子读一遍。( )1A.Yes, you' better not.( )2A.You can ask him.( )3A.That's right.( )
看图,回答你所听到的问题。1.__________________________________2.__________________________________ 3.____________
听问句,选答句。( )1. A. Hello! Dale! ( )2. A. I’m fine. ThanksB. Good morning, Eric!B. Thanks. C. How are y
听句子,选择可能的说话时间。A. 10:00B. 14:20 C. 20:151.____________ 2. _______________3. ______________-七年级英语
给听到的名字排序,把A,B,C等序号写在横线上。A. HelenB. GraceC. BobD. CindyE. Alice F. EricG. Frank H. Dale1.______2. ___
选出听到的字母。1. CG2. AH 3. EF4. BD1._____2._____3._____4._____-七年级英语
听短文,选择正确的答案,听两遍。1. Betty is ______.A. EnglishB. AmericanC. America2. Betty's father is an _____
听一段对话,回答问题。1. 请选出对话中提到的物品。A. A map, a key, and a ruler B. A jacket, a quilt and a penC. A map, a jac
听短文,选择正确答案。1. What was the weather like yesterday?A. Rainy.B. Cloudy.C. Sunny.2. Who did the writer
听对话,选择正确答案。1. What happened in the boy's dream?A. He saw a UFO. B. He dreamt about his school.
听对话,选择正确图片。( )1. ( )2. ( )3. ( )4. ( )5. -八年级英语
听句子,选择正确答语。( ) 1. A. That's a dream.( ) 2. A. Good idea.( ) 3. A. Close the window.( ) 4. A. No
听短文,根据短文意思进行改写填空。短文读两遍。 Class Two will have a1tomorrow. The students will go to Dongfang Nature Park
听短文,判断正(T) 误(F)。短文读两遍。( )1. Robots have a long history.( )2. The first robot was invented by a Greek
听对话,选择正确答案,听两遍。( )1. A. A clock ( )2. A. Jim's( )3. A. Jim is( )4. A. He is my father( )5. A. Y
听句子,选择相应的答语,听两遍( ) 1. A. How are you? ( ) 2. A. I'm Amy.( ) 3. A. Yes, it's a ruler.( ) 4.
听力填表。NamesAgesJobsHobbiesPlansPaul43(1)_______soccerTo teach English in China.Jane(2) ___art designe
听短文,请选择适当的选项填入空缺处。 A. Cousin B. Jack Smith C. King Smith D. Brother E. MotherFamily member (成员): Nam
听下面一段对话。 回答 小题.。1. The notebook is _____. A. red B. white C. black2. A _____ is in the notebook. A.
听下面一段对话, 回答 小题。1. Helen and Emma are _____. A. sisters B. friends C. cousins2. _____ are sister and
听对话,选择最佳选项。1. That is the girl's _____. A. fatherB. grandfatherC. uncle 2. Bob and the boy are
听对话,选择正确的答案。1. Where did the dialog (对话) happen? A. In the school. B. In the station. C. In the hosp
听对话,选择正确的答案。对话读两遍。( )1. A. Going to the park. B. Visiting her grandmother. C. Spending time with her
你将听到五个句子,找出与所听内容相符的图片。 A BCD E1. _____2. _____ 3. _____ 4. _____5. _____-八年级英语
听句子,选择与句子内容相符的图画(有一幅是多余的)。 A B C D EF 1. _____ 2. _____ 3. _____ 4. _____ 5. _____-八年级英语
听短文,回答问题。1. When do tigers live as a family?A. When they have wivesB. When they have babiesC. When t
根据所听对话,选出最佳答案。1. What does a baby panda look like?A.A houseB. A mouthC. A mouse 2. How much does the
根据所听内容判断正误。( )1. Sandy, Billy and Sue are with their teachers at the zoo.( )2. There are many animal
根据所听句子选出应答句或选图。 ABCD E1. ______ 2. ______ 3. ______ 4. ______ 5. ______ -八年级英语
听对话,根据所听内容填写下面的身份证卡片。FIRST NAME:__1__ LAST NAME:__2__TELEPHONE NUMBER: 576-3952FIRST NAME:__3__LAST
选出与你听到的句子意思相符的图画。NickKim Jim Jenny Tony A B C D E 1._____ 2. _____3. _____ 4. _____ 5. _____-七年级英语
选出你听到的选项。( ) 1. A. my B. his C. her D. your( ) 2. A. Alan B. Mary C. JennyD. Tom( ) 3. A. 959-28B. 5
听短文和问题,选择正确答案。1. Is Mary a running star?A. Yes, she is.B. Yes, I am.C. No, I'm not.2. What does
听短文,选择正确答案。( ) 1. A. Dave is ten years old. B. Dave is nine years old. C.Dave is thirteen years old.
听对话,判断句子正(T)误(F)。( ) 1.Miss Green is an English teacher. ( ) 2.Linda likes math. ( ) 3.Mike doesn
听问句,在对应的答语前标上序号[1-5]。_____ A. On Monday._____B. Yes, he does._____C. No, I don't._____D. I'
听段材料,选择答案。1. What is popular with all the people in the world? A. Football.B. Music. C. Sport.2. Why
返回顶部
题目简介
若=0,则一定有[]A.a=0B.b=0C.a=b=0D.a=0或b=0-七年级数学
题目详情
B.b=0
C.a=b=0
D.a=0或b=0
答案