It should be apparent that little or nothing is gained by opening a drain at the same time as or after admitting steamThe above sentence probably means （）.

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）

河海大学是一所以水利为特色的全国重点大学。请问，河海大学的前身“华东水利学院”是于哪一年由南京大学、同济大学、交通大学、浙江大学、华东水利专科学校的水利系科合并而成？（）

It is generally considered unwise to give a child___( )_____ he or she wants.

 ______ 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.

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

A person ______ e-mail account is full won’t be able to send or receive any e-mails.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

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

华北水利水电大学（花园校区）位于（）。