组氨酸是半必需氨基酸

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组氨酸是半必需氨基酸
急需从1949年到2008年的中国的大事年表!重要部分需要做专题来表现. 求2008年大事年表社会,经济,娱乐··············都要 韩寒大事年表2008至2009嘻嘻~包括他赛车方面的及写作方面的~感激不尽啦~ 下学期中国 近代史1949年开始的历史大事年表 今年“全国中小学生安全教育日”活动的主题是什么? 急!2012第十七个全国中小学生安全教育日活动的主题都说三月份才有,现在知道了吗? 数学(找证明错误) 证明1=2?如果a=b,且a,b>0,证明1=2?证明:∵a,b>0 a=b (已知)∴a×b=b×b 第二步“=”的两边同时乘“b”∴a×b-a×a=b×b-a×a 第三步“=”的两边同减“a×a”∴(b-a)=(b+a)(b-a) 第四 cross,across,through有什么区别 My mother goes shopping on sunday改一般疑问句 Which is your favorite month?怎么回答 I like kites ,but i ( ) fly kites.I like kites ,but i ( ) fly kites.don't worry,I can ( ) you how to fly it across和through用法上的不同,和口诀 上钢琴课 have a piano lesson have piano lessons 那个可以?还可以怎么说? 用括号里的词写出他们不能出席的理由Sam____________________(have a piano lesson) 人为什么不能控制自己的言行举止? The b____ of the yellow mountain made me happy and excited首字母填空 through和across的区别及用法 who can we choose to be the host of the charity show?改为被动语态.8B的,别太高深. Have you( ) heard of DisneyIand?A.aiways B ever C.never Ricky felt (happy) in the charity show.对括号内提问 I was happy because I was chosen ___ of the charity show .A.be the host B.being the host C.to be the host D.was the host语感上应该选C,但选C有没有什么语法依据呢?请详解, I ____ _______to be the host of the charity show yesterday.(choose(sb.)to do) Don't h____ to contact me if you need any more information we fly kites. 为什么fly 是动词原形,谢谢 he gave me tne phone number ________ to contact him when we are in need of help.A.in order me to B.in order of me to C.in orderfor me to D.that I为什么选C,每个选项都要详细解释 pls write us your contact. and we need more large pictures of you.什么意思?Thank you.From Allen. APS又是什么意思? The news he told us _ made us very excited.A has B have C is D be Luckily she _____成功 in passing the test last week she t_lots of notes to improve her chines last term. I like hamburgers,do you like them.I like hamburgers.______ ________you?句形换 I——eat vegetables althouth i do not like them.横线上填have to还是will?为什么 I need somebody to help you?请问:该句中 主语——I谓语——need宾语——somebody“to help you”在句中做“宾补”还是“目的状语”用于修饰全句的呀?