柴油机直接驱动螺旋桨，为了限制柴油机的最低转速，一般规定（）。a．按全负荷速度特性工

根据句子意思，每空填一个英语单词。

1. What's this in E______?

2. How do you s______ book?

3. Is that your e______?

4. This is her w______.

5. Is that a pencil s______?

6. What is your l______ name?

7. This is my school ID c______.

8. His f______ name is Tom.

9. What's your p______ number?

10. It is my r______.

如果父母双方都是双眼皮（基因组成Bb，双眼皮为显性），其子女是单眼皮的基因型为

A． Bb

B． BB

C． bB

D． bb

下列关于胶体的说法正确的是[ ]

A．胶体属于混合物

B．胶粒不能透过滤纸

C．胶体不稳定，静置易析出沉淀

D．胶体都是液体

A lot of research and studies have shown that Trench oil, taken out from kitchen waste, ______ the increase of cancers.

A appeals to    B. attends to      C. contributes to    D. devotes to