空压机的曲柄连杆机构采用球墨铸铁悬臂、马蹄口铁连杆和（）活塞组成。
参考答案：铸铝
选出能够替换句中划线部分的选项。
a. trouble b. quite worried c. very important d. running after e. waste things
( ) 1. The dog likes chasing the chick.
( ) 2. It’s crucial that we study English well.
( ) 3. She’s anxious because of the test.
( ) 4. Xiao Ning found garbage in front of the house.
( ) 5. Don’t bother your father. He is busy with his work now.
写出与下列繁体字相对应的简化字。（4分）
謄（ ）
