产生制动的原始力量即称为（）。

A.制动传动力

B.制动原力

C.制动率

D.制动力

请用下列单词或短语的适当形式填空.

Now you are in a dinosaur   1  park. Coming here, you will find a kind of old   2  , which has

died out millions of years ago, dinosaur. In our park, we are happy to show you     3   dinosaurs,

which lived in the Jurassic. The four-storied-building-high grass-eating dinosaurs are submissive

(温顺的) and kind. You can  4    towards them and touch them. But the   5  of them are dangerous.

The four-legged meat-eating dinosaurs are very cruel. Please don't    6  them and don't try to give

them food. The    7  here is very thick and full of all kinds of animals that lived in the Jurassic. Without

any special    8  and the leading of the guide, please don't step into it. OK, I'm sure that our park will

    9  anyone who comes here and you will   10 a lot from it.