一个糖原分子只有一个还原端,但却有许多个非还原端。
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The Eiffel Tower, being one of the architectural wonders in the world, enjoyed great fame and praise since the very beginning, and within a short period became the iconic image of the city.
有梁板系指梁(包括主,次梁)与板构成一体,其工程量应按梁、板总和计算。与柱头重合部分体积不扣除。()
当杠杆逆时针转动时,图中零件3速度大于零件4的速度。