美国总统既是国家元首，又是政府首脑，因此，美国总统向国会负责。

在Excel2003中，假定单元格B2和B3的值分别为5和10，则公式=OR（B2>5，B3>=8）的值为（）。

国家元首兼任政府首脑，既行使国家元首的职权，又行使最高国家行政权是属于（）

“一带一路”国际合作高峰论坛有（）个国家元首和政府首脑，（）位重要国际组织负责人出席论坛，有（）个国家和（）个国际组织参加。

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。

●设AND、OR和NOT分别表示按位与、按位或和按位求反运算，且X=10011011，Y=01111010，Z=11101000，则(NOT(X) AND Y)= (9) ， (Y OR NOT(Z))= (10) 。10011011011110101110100001100000(10)

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。