既为中医学理论体系的确立奠定了基础，也是中医学在理论与实践方面继续发展基石的书籍是（）

输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。

（）是中医学最古老而完整的典籍，它奠定了中医学的理论基础。

哪个时期中医学出现了医学上的分科？（）

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。

中医学讲的人体经络实际上就是西方医学中的血管。