题目

下列关于细胞器的叙述错误的是（ ） A . 溶酶体是“消化车间”，内含多种水解酶 B . 抗体和载体都在核糖体中合成 C . 常用差速离心法分离细胞内各种细胞器 D . 内质网是细胞的“养料制造车间” 答案：D阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。Keeping a diary in English is one of the effective ways to improve our English writing ability.(compare) with other forms of writing, it is shorter and takes (little) time. It can help us to develop the habit of thinking in English. If we persist in(坚持) this practice, gradually we'll learn how to express (we) in English. In keeping a diary in English, we certainly run up against many(difficult). In the first place, it often happens that we have trouble in (find) appropriate words and phrases to give expression to our mind. Secondly, there (be) many idiomatic ways of saying things in Chinese. And it is (extreme) hard for us to put them into English properly.As far as I am concerned, my suggestion is we should always have a notebook and a Chinese-English dictionary within easy reach. Whenever something beats us, we can first put it down in our notebook and then consult our dictionary. We can also ask our English teacher help, if necessary. In short, I believe that it is of great use to keep a diary in English for development of our writing skills.