—Mum, can I have something _______?
—Oh, dear. You can only drink some water. There is _______ in the kitchen.
A:to drink; nothing else
B:drinking; something else
C:to eat; something else
D:eating; nothing else
以下具有生物膜结构的细胞器是( )①线粒体②核糖体③中心体④高尔基体⑤内质网⑥液泡⑦溶酶体⑧叶绿体
从1,2,3,4中任取两个不同的数,其乘积大于4的概率是____ .