Recirculating-ball steering gear contains following main components: worm gear, ball nut, steel balls and sector gear, which are all in one steering gear box．

Which ball is the man's ball?

I don’t want to use Mary’s ball pen because I don’t like __________ . A: that ball pen of hers B: that her ball pen C: her that ball pen D: that ball pen of her

( ) Where does Romeo meet Juliet for the first time? A: A Capulet ball B: A Montague ball C: A ball held by Count Paris D: A ball held by Friar Laurence

manual steering system_____ power steering system____ rack-and-pinion system_____ Recirculating-Ball system____steering wheel_____ Hydraulic Damper

Nowadays, two types of steering gear are mainly used: rack-and-pinion steering gear and recirculating-ball steering gear．

Because of the way the ball initially _______, the return of the ball will be unique each time.

A ping-pong ball and a tennis ball ___ under the bed. A: is B: am C: are

var_dump（explode（'o','fotoball',3））;？运行结果是（忽略数组格式）（） A: fo？to？ball B: f？t？ball C: o？o？ball

One player can() A: run B: bounce<br/>the ball C: catch<br/>the ball