Dim b1，b2 As Boolean语句显式声明变量（　　）。

Clouds that form as small white flakes or scaly globular masses covering either small or large portions of the sky are（）.

Project（71）is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

Project ______is an uncertain event or condition that，if it occurs，has a positive or a negative effect on at least one project objective，such as time，cost，scope，or quality．

● Project（71）is an uncertain event or condition that, if it occurs, has a positive or a negative effect on at least one project objective, such as time, cost, scope, or quality.（71）

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（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.

Damage to cargo caused by fumes or vapors from liquids，gases，or solids is known as（）.

使用Dim语句声明一个变量后，可以使用ReDim语句把此变量重新声明为其他类型。

使用Dim语句声明了一个变量以后，还可以使用Redim语句把此变量重新声明为其他的类型。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。