从细胞结构看,“种瓜得瓜,种豆得豆”这种现象主要决定于( )
A:细胞壁
B:细胞膜
C:细胞质
D:细胞核
— I think travelling by train is more comfortable than travelling by plane.—_________. In my opinion, travelling by plane is more comfortable.
用手指去触摸0℃的水和0℃的冰时,下列说法中正确的是()