What is the default value for the ENABLED attribute of a job or program when it is created? （）

Before welding is permitted on a fuel tank, it must be certified or declared （）

集邮业务员的职责是传播社会主义精神文明和物质文明，传播历史和现代文化。

A：What ()（时间）is it ? B：It’s nine forty-five.

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.

I think you should end it ______ it is too late, or you will be sorry for it.

Bob: What are you reading, Tom?　　Tom:It’s this week’s New Scientist, why?　　Bob:I was just wondering—______, but I’ve never actually read it myself. Is it aimed at real scientists or can ordinary people like me understand it?

It is customary in shipping practice to quote freight rates（）weight or measurement,ship’s option.

What is the most important when it comes to a good job: money, colleagues, boss or the working environment?