单项选择题
A small light tackle with blocks of steel or wood that is used for miscellaneous small jobs is called a（）.
A.snatch block B.threefold purchase C.handy-billy D.chockablock
单项选择题 A single heavy wire made up for the topping lift is called a（）.
单项选择题 A serving mallet is used in（）.
单项选择题 A sea anchor is（）.
