8051单片机的复位信号是（）

输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

MCS-51单片机上电复位的信号是（）

注册土木(岩土)工程师的执业范围是（　）? ①岩土工程勘察。②岩土工程设计。③岩土工程监理和咨询。 ④岩土工程治理、检测和监测。⑤环境工程与岩土工程有关的水文地质业务。

注册土木工程师（岩土）的执业范围是（　　）。Ⅰ．岩土工程勘察Ⅱ．岩土工程设计Ⅲ．岩土工程监理和咨询Ⅳ．岩土工程治理、监测和检测Ⅴ．环境工程与岩土工程有关的水文地质业务

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。