青蛙发育的先后顺序是（）。①受精卵②有内鳃的蝌蚪③有后肢的蝌蚪④有前肢的蝌蚪⑤有外鳃的蝌蚪⑥幼蛙⑦成蛙A．①②③④⑤⑥⑦B．①⑤②③④⑥⑦C．①③②④⑤⑥⑦D．①④③②⑤⑥⑦-八年级生物

更多内容推荐

• —My son is addicted to computer games. He is hopeless, isn't he?—Yes, ________ he is determined
• Most volunteers are from universities, _________ it is not uncommon to see middle and primary school
• Tom is good a studenthe is often praised by the teacher.A．such; as B．so; asC．such; thatD．so; that-高一
• ___________you try to do something beyond what you have already mastered, you will never grow.A．Sinc
• Here are my neighbours ________home was destroyed by the earthquake.A．whoseB．whoC．whomD．that-高一英语
• _____there are many different types of food, some animals spend their lives eating only one type.A．S
• ___________there are many different types of food, some animals spend their lives eating only one ty
• Leave your key with your neighbor ________ you lock yourself out one day.(2012·辽宁)A．as long asB．eve
• A number of high buildings have arisen ________ there was nothing a year ago but ruins.(2012·山东)A．w
• 每年春末夏初，池塘边传来阵阵蛙鸣，这是雄蛙在（）A．唱歌B．求偶C．捕鱼D．呼吸-八年级生物
• 青蛙的发育经过了_______、_______、_______和_______四个阶段，其幼体和成体在外部形态、内部结构和生活习性上都有许多差异，幼体生活在_______，用_______呼吸；成体既
• Dick made a phone call to his wife, ________ was certain about where the car key was.A．whichB．whatC．
• Paul was not allowed to work he was fully recovered from the flu. A．even ifB．whetherC．becauseD．unti
• —Do you have a minute？I've got something to tell you.—OK，________ you make it short.A．now thatB
• How long do you think it will be _______ China sends another manned spaceship to the moon?A．whenB．un
• It was 1995 __________ we began to develop the new computer system.A．whenB．whichC．sinceD．that-高二英语
• ---Sunday is a public holiday, _____children should get close to nature. ---But most of them have se
• Recently Shanghai has a lot of visitors, most of _____ come to see the 2010 Shanghai Expobeing held
• You should report any incident, _______ minor it is.A．whateverB．wheneverC．howeverD．wherever-高三英语
• She realized that it was not the words but the way she spoke to Bruce ________ hurt him.A．whoB．whomC
• This coat will lose its color ___________ it's washed.A．asB．afterC．untilD．while-英语
• —What was the party like?—Wonderful. It’s years __________I enjoyed myself so much.A．afterB．beforeC．
• . Mary was so glad _______ she was invited to attend the most important party.A．thatB．whereC．whyD．wh
• (2012·福建，30)It is hard for the Greek government to get over the present difficulties ________ it get
• Being determined is a kind of quality and that’s ________ it takes to do anything properly.A．howB．wh
• Our parents always tell us to believe in_______we do if we want to succeed.A．whyB．howC．whatD．which-高
• I’m sorry you’ve been waiting so long,but it’ll still be some time_____Tom gets back.A．whenB．beforeC
• — Why didn’t you watch the program “Where are we going, Dad?”? — It was because something was wrong
• ___he daydreamed, Peter saw figures in the sky.A．UntilB．SinceC．WhileD．During-英语
• I’m progressing in physics ____ the teacher’s well-organized teaching and exact explanation．A．becaus
• It is often said that the joy of traveling is ______ in arriving at your destination ______ in the j
• (2013·济南二模)It was during the Ming Dynasty ________ the Great Wall was repaired and extended to take
• The food was good, _______ he had little appetite (食欲).A．soB．otherwiseC．howeverD．but-高三英语
• You can borrow my car ________ you promise not to drive too fast.(2012·江西，31)A．unlessB．even ifC．in c
• One's life has value ________ one brings value to the life of others.(2012·江苏，30)A．so thatB．no
• I have a tight budget for the trip，so I'm not going to fly ________ the airlines lower ticket
• ________，Carolina couldn't get the door open.A．Try as she mightB．As she might tryC．She might tr
• ---When choosing furniture, you focus on function while I think more about the design.---That’s_____
• There will be a twenty-minute break during the performance, ______ people can go to the restroom or
• When travelling in buses or trains,we are likely to have conversations _____ we give information or
• That is the best way you thought of _______ into trouble.A．stopping some young people to get B．to p
• He was admitted to our school two years ago, a top school in our hometown, _____ he has been crazy a
• _____ David goes, he is welcome.A．Whichever B．HoweverC．WhereverD．Whatever-英语
• 14. Give the book to wants it.A．whoB．whoeverC．no matter whoD．whomever-英语
• Mr. Li, leader of the team, always think of _______ he can do more for his teammates. A．whatB．thatC．
• 下列对青蛙生殖发育特点描述正确的是（）A．体内受精，体内发育B．体外受精，体外发育C．体内受精，水中发育D．体外受精，水中发育-八年级生物
• ________ the jewels were locked in a strong box，the thieves stole them without any difficulty.A．IfB．
• (2013·安徽蚌埠二检)Could it be in the restaurant ________ you had dinner with me yesterday ________ you lo
• Take the note as a reminder ________ you forget to buy some sweets for the kids while shopping there
• China is developing fast. That's ________ I think those of my colleagues who deal with China af