单词拼写（共10小题；每小题1分，共10分）

小题1: A great celebration was held on his _________(50岁)birthday.                

小题2:He dived into the water, leaving only his face _________(暴露)             

小题3: Some people work together under _________(压力)                     

小题4:He said he was late because of a traffic jam. But it didn’t sound like

a      _    （合理）enough excuse.

小题5: A _______（图书管理员）is a person who helps you when you want to borrow books from a library. 

小题6: They needed five more ____ (工程师) to complete the design.            

小题7:They were _______(秘密地)married last week.                           

小题8: She was well known as an ______(出色) dancer                          

小题9:His job is to do ________(科学)research.                                

小题10:He has formed the habit of getting up and going to bed early and does

everything ________(有规律)

在如图所示的图形中，A弧长为多少？（）

A.80.89

B.88.09

C.40.44

D.45.04