题目

I had my first job at the age of thirteen, when a friend of my mother’s who owned a book shop 36 me for six hours a week to help her in the shop. I was very 37 to earn my own pocket money and my parents 38 interfered with how I spent it, even when I was spending it 39 . They believed that by earning money, spending it, and learning from the 40 , I would become more mature and 41 about how to handle work, relationships with others, and money. Like many 42 parents, my parents also let me and my brothers do things over which they 43 a great deal. When I was sixteen, for example, after 下列关于果胶酶的叙述正确的是 ①具有分泌功能的细胞产生的 ②凡是活细胞都能产生果胶酶 ③果胶酶能将果胶分解成半乳糖醛酸 ④植物、霉菌、酵母菌和细菌均可能产生果胶酶 ⑤果胶酶特指分解果胶的一种酶 ⑥纤维素酶和果胶酶可用于去除植物细胞壁 ⑦组成果胶酶的基本单位是氨基酸或核苷酸 [  ] A.①②⑤ B.②③⑦ C.③④⑥ D.③④⑤
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