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- 1There is not the ____ doubt about that.
- 2生物体内的蛋白质千差万别,其原因不可能是( ) A.组成肽键的化学元素不同 B.组成蛋白质的氨基酸种类和数量不同 C.氨基酸排列顺序不同 D.蛋白质的空间结构不同
- 3The key ___ on the table when I leave.
- 4very a few;very a little,有这两种用法吗?very few/little是代表肯定意义相当于
- 5for several days改成since
- 6有哪些寓言故事?
- 7八年级下册语文第二课我的母亲 文中一共写了母亲的哪几件事?
- 8证明石蜡中含有氧元素的步骤?
- 9若时钟指示6点45分,则它的时针和分针所成的锐角是_度.
- 10He said he had q___ a few questions to sak our English teacher.