Form a double thickness of heavy-duty foil (about 14 in. square); cut three slits in foil.
做一个双层金属箔(大约14英寸见方),在上面划三道口。
2
RNA molecules formdouble stranded helices, just as do DNA molecules, by Watson Crick pairing of nucleotides on the two complementary strands of the helix.
RNA分子能像DNA分子那样形成双链螺旋,通过沃森·克里克配对,两个螺旋的核苷链互补。
3
You get the same EnterRoomInformation form again, because a double room is not available for booking in the sample data.