阅读下面材料，从每题所给的三个选项（A、B和C）中，选出最佳选项。

Invention 1	These glasses are made from a special liquid(液体). They allow users to adjust the focus(调整焦距) of the glasses until everything is clear. They are designed for children. So they won’t buy new glasses every time when their eyesight changes.
Invention 2	The Donkey Bike has a strong steel bar(钢条) running along it. It can carry both a gas can and a pet at the same time when you ride this bike.
Invention 3	This machine looks friendly and is called Little Printer. It can print news headlines, riddles and other things on a roll(卷) of paper. So you can make your own little newspaper with it.

小题1:The special glasses are made from ______.

A. steel        B. liquid     C. paper

小题2:Which of the following is True about the “Donkey Bike”?

A. It can carry four persons.

B. It is designed for children.

C. It includes a strong steel bar.

小题3:The roll of paperin Little Printer is used for ______

A. cleaning the cover of the machine       

B. printing your own newspaper

C. reading news headlines or riddles

小题4:A child who has poor eyesight may be interested in ______.

A. Invention 1       B. Invention 2     C. Invention 3

小题5:The passage is mainly about ______.

A. the change of eightsight    B. a gas can and a pet    C. some cool inventions

企业息税前利润与利息费用的比率为（）。

A．市盈率

B．已获利息倍数

C．资金成本

D．产权比率