根据车钟记录簿记载规定，下列哪个符号表示完车（）。
A．√√
B．√
C．×
D．○
参考答案：D
Any car that would ____ these young customers has to have three main features, great style, strong performance and a low price.
A．attend to
B．contribute to
C．appeal to
D．add to
气缸盖螺栓预紧力大小均匀，可避免因（）而引起的疲劳断裂。
A．附加应力
B．机械应力
C．热应力
D．A+B+C
