根据中文，句意及首字母填入所缺单词（共10分，每题1分）

小题1:There is a big _______ (操场) in my school?

小题2:The windows of our classroom are _______ (干净)

小题3:This is Carl. He is very _______ (有礼貌的).

小题4:—Is this dog very _______ (高兴的)?  —Yes, it is.

小题5:Jim is my uncle’s son. He is my ________ (表兄).

小题6:We have a computer lesson on _____________ morning. (星期四)

小题7:She has two p_____ of trousers in the red box.

小题8:It’s not my book. M_____ is new.

小题9:There are lots of books in their_______ room .

小题10:There aren’t any t_______ on the first floor.

关于焦比的说法正确的是（）。

A、每吨合格生铁的干焦消耗量

B、高炉一天的干焦消耗量

C、K=ηu/I

D、单位kg/t