平面M内的三角形ABC三边长AB、BC、CA分别是6、10、8，V为平面外一点，已知VA＝VB＝VC＝7，求点V到平面M的距离．

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。

已知三角形的两边长分别为3cm和8cm，则此三角形的第三边的长可能是（ ）

已知三角形三边长分别为2，x，13，若x为正整数，则这样的三角形个数为（）

已知三角形三边长分别为3、15、X。若X为正整数，则这样的三角形有多少（ ）

已知三角形三边长分别为3、15、X。若X为正整数，则这样三角形有多少个？