这是什么踏板？（）
A．加速踏板
B．离合器踏板
C．制动踏板
D．驻车制动器
参考答案：C
下列动物的行为属于先天性行为的是（ ）
A．老马识途
B．惊弓之鸟
C．鹦鹉学舌
D．孔雀开屏
—I’m told that our plane will at least delay 3 hours.
—What do you think has happened?
—It is said to have been _______ by a terrible storm.
A．held out
B．held in
C．held on
D．held up
