冲积土是由河流的地质作用形成的。（）

( )16河流的截弯取直是河流地质作用中哪种作用造成的( )?

OR指令的作用是: 。( )

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

以下哪些情况会造成提示“Incorrect number or IP address”？（）

河流的侧蚀作用使河谷变（）和变弯。

河流上游以侧蚀作用为主，河流中下游以下蚀作用为主。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

河流的袭夺是由河流的向源侵蚀作用形成的，向源侵蚀作用由于河流地质作用的（　　）。