Being League members, ___ we ought to work hard at our lessons;___ we ought to take an active part in social activities. A. on one hand…on other hand B.on the one hand….on the
Maybe you have been to many countries, but nowhere else ________ such a beautiful place. A. can you find B. you could find C. you can find D. could you f
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，地球表面的重力加速度为g，则火星表面的重力加速度约为( )