Q4: Do you think it’s a good idea to move staff around within a company from time to time? (Why?/Why not?)

When to remove scale from the cooling spaces, acid solution （） in the system can be tested from time to time by putting some on to a piece of lime.

60.  A from time to time   B  in time    C  sooner or later   D on occasion

Which MySQL utility program should you to process and sort the slow Query log based on query time or average query time?（）

The consignee’s refusal to take delivery，or failure to do so within a reasonable time，also puts an end to（）liability as a carrier.

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（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）

—Hurry up, or we’ll be late.—Take your time. it’s just ______ short distance from here to ______ cinema.

If necessary to avoid collision or allow more time to（）the situation，a vessel shall slacken her speed or take all way off by stopping or reversing her means of propulsion．

Jitter is an unwanted variation of one or more characteristics of a periodic signal in electronics and telecommunications and（）refers to call issues that cause variations in timing or time of arrival.

The （） is used to measure the volume of a liquid or gas through a pipeline within any given period of time.

已知“A、B二人中至少有一人懂英语”、“只有B刁懂英语，A才懂英语”和“A不懂英语并且B也不懂英语”这三个判断中，只有一个为真。据此，便可必然推出下列判断中为真的是（）。