一阶系统的传递函数为 G（s）=1/（s+1），在输入 xi（t）=4cos（t-30°用下的稳态输出为（）

一阶系统传递函数为G（s）＝K/（1＋Ts），单位阶跃输入，要增大输出上升率，应（　　）。[2010年真题]

若开环传递函数为G（s）=K/s（Ts+1），此时相位裕量和Ｋ的关系是（）

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

华北水利水电大学（花园校区）位于（）。

一阶系统的传递函数为k/（Ts+1），则其单位阶跃响应为（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。