题目

细胞是生物体的结构和功能的基本单位，下列有关细胞结构与功能的叙述中错误的是（ ）A. 核糖体上合成的物质不具有携带遗传信息的功能B. 线粒体内膜蛋白质的种类与含量均比其外膜的高C. 吞噬细胞的溶酶体能合成多种水解酶，这与其功能相适应D. 神经元内突触小泡的形成与高尔基体密切相关 答案：【答案】C【解析】核糖体上合成的物质是蛋白质，不具有携带遗传信息的功能，A正确；线粒体内膜向内折叠形成脊是有氧呼吸第三阶段发生的场所，释放了大量的能量，则线粒体内膜蛋白质的种类与含量均比其外膜的高，B正确；吞噬细胞的溶酶体内含有多种水解酶，这些水解酶是在核糖体合成的，C错When milk arrived on the doorstepWhen I was a boy growing up in New Jersey in the 1960s, we had a milkman delivering milk to our doorstep. His name was Mr. Basille. He wore a white cap and drove a white truck. As a 5-year-old boy, I couldn’t take my eyes off the coin changer fixed to his belt. He noticed this one day during a delivery and gave me a quarter out of his coin changer.Of course, he delivered more than milk. There was cheese, eggs and so on. If we needed to change our order, my mother would pen a note----“Please add a bottle of buttermilk next delivery”----and place it in the box along with the empty bottles. And then, the buttermilk would magically appear.All of this was about more than convenience. There existed a close relationship between families and their milkmen. Mr. Basille even had a key to our house, for those times when it was so cold outside that we put the box indoors, so that the milk wouldn’t freeze. And I remember Mr. Basille from time to time taking a break at our kitchen table, having a cup of tea and telling stories about his delivery.There is sadly no home milk delivery today. Big companies allowed the production of cheaper milk, thus making it difficult for milkmen to compete. Besides, milk is for sale everywhere, and it may just not have been practical to have a delivery service.Recently, I saw an old milk box in the countryside. I took it home and planted it on the back porch （门廊）. Every so often my son’s friends will ask what it is. So I start telling stories of my boyhood, and of the milkman who brought us friendship along with his milk.【小题1】Mr. Basille gave the boy a quarter out of his coin changer____.A．to show his magical powerB．to pay for the deliveryC．to satisfy his curiosityD．to please his mother【小题2】What does “this” in the third paragraph refer to?A．The milkman’s magic powerB．The milkman’s kindness to meC．The note to change an orderD．The home delivery service【小题3】What can be inferred from the fact that the milkman had the key to the boy’s house?A．He wanted to have tea there.B．He was a respectable person.C．He was treated as a family member. D．He was fully trusted by the family.【小题4】Why does home milk delivery no longer exist?A．Nobody wants to be a milkman now.B．It has been driven out of the market.C．Its service is getting poor.D．It is forbidden by law.【小题5】Why did the author bring back home an old milk box?A．He missed the good old days.B．He wanted to tell interesting stories.C．He missed it for his milk bottles.D．He planted flowers in it.