苏联是在哪一年解体的？（）

东欧剧变和苏联解体表明（）?
①社会主义的失败②社会主义必须与各国的实际相结合③社会主义没有固定不变的模式④西方国家绝对不会放弃和平演变?

20世纪80年代末90年代初东欧剧变、苏联解体，社会主义国家的数量急剧减少，这表明社会主义的失败。

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.

东欧剧变、苏联解体说明社会主义制度本身存在弊端。（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

苏联解体，戈尔巴乔夫辞职，叶利钦接管政权是在哪一年？（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。