A:外界溶液浓度大于细胞液浓度
B:外界溶液浓度小于细胞液浓度
C:原生质层的伸缩性较大,细胞壁的伸缩性较小
D:原生质层的伸缩性较小,细胞壁的伸缩性较大
地球自转一周的时间约为( )
⑴What's your favourite food ?____ A. Ten yuan.
⑵Where do tigers live ?____ B. They live in the forest.
⑶What's for lunch ? ____ C. I like some noodles.
⑷How much is it ?____ D. My favourite food is rice.
⑸Can you swim ?____ E. No, I can't.