下列有关男女同学相处说法错误的是（）。

下列有关男女同学相处说法错误的是（）

描述全校男女同学的比例关系，最好使用（）。

青春期男女同学之间关系的变化模式为（）。

试题21关于CSMA/CD的描述中，错误的是（ ）。

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.

试题15关于网络拓扑的描述中，错误的是（ ）。

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。