题目内容

Section DGood afternoon, ladies and gentlemen. Thank you for coming to our conference this afternoon. I’m Henry Johnson, the _____(20)of Smart Toys. Now I’d like to introduce you to a completely _____(21) of toy manufacture. Firstly, I’ll talk about the market research which led to the _____(22)of this product. Then I’ll explain the production and our sales plan. Finally I’ll make some suggestions so that you can make product a ______(23). We are confident this new product will sell well in the ____(24). At the end of my speech, we’ll have a question-and-answer section.

查看答案
更多问题

细胞膜上含量最多的脂类物质是

A. 胆固醇
B. 鞘磷脂
C. 甘油磷脂
D. 糖脂

细胞膜脂质分子经常发生的运动是

A. 侧向扩散
B. 旋转运动
C. 摆动运动
D. 翻转运动

膜脂都是两亲性分子,极性头部亲水,非极性尾部疏水。

A. 对
B. 错

受到水的静力动力作用并与水发生相互影响的建筑物称之为水利枢纽

A. 对
B. 错

答案查题题库