将紫色洋葱鳞片叶表皮置于质量浓度为0.3g/ml的蔗糖溶液中,原生质层和细胞壁之间将[ ]
A.紧紧贴在一起
B.充满细胞液
C.充满蔗糖溶液
D.充满清水
答案:C
—I am afraid this pair of shoes is a little expensive.
—If you really want to buy them, I will give you a ____ of 10 percent.
A.quantity
B.amount
C.discount
D.account
中闪点易燃液体是指()。
A.闪点小于-18℃
B.闪点大于-18℃
C.闪点大于23℃
D.闪点大于-18℃,小于23℃