安定面配平作动筒有一个高速和一个低速,什么部件控制配平作动筒的速度?()
A.机头向下起飞警告电门
B.机头向上起飞警告电门
C.驾驶杆切断电门
D.襟翼收上电门
参考答案:D
Our national football team had to _____ the fact that we missed the championship only by one goal.
A.come up with
B.come up to
C.come out with
D.come to terms with
树木的不定芽除应保留的以外,在嫩芽长出()时应即时抹除。
A、已木质化时
B、未木质化时
C、第二年春天
D、当年秋天