设a=′′a′′，b=′′b′′，c=′′c′′，d=′′d′′，执行语句x=IIf（（ad），′′A′′，′′B′′）后，x的值为（　　）。

木材防腐剂种类中的水溶性防腐剂扒包括（）。

木材防腐处理用的防腐剂分为油类防腐剂、（）防腐剂和其他防腐剂等

木材防腐可采取两方面的措施：一是保证有良好的（），防止木材产生冷凝水，二是涂刷或浸溃各类防腐剂进行防腐处理。

木材防腐剂种类中的水溶性防腐剂扒包括（）。

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）

 ______ twice a year, whether it is a car or a bus or a truck, is the rule that every driver must obey in this city.

A declaration made by the Master before a PRC Consul，giving particulars regarding heavy weather or other incidents which may have caused damage to the vessel or cargo，through no fault of the vessel，her officers，or crew is a(n)（）.

It will be a relief over the death of a friend or a relative if the friend or relative dies from ______.

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