在质量浓度为0.3g/mL的蔗糖溶液中,下列能够发生质壁分离的细胞是()
A.人的口腔上皮细胞
B.蛙的红细胞
C.皮肤的角质层细胞
D.洋葱的表皮细胞
参考答案:D
—I can't repair these until tomorrow,I'm afraid.
—That's OK. There's ________.
A.no problem
B.no wonder
C.no doubt
D.no hurry
最小准爆电流