● （71） means that a program written for one computer system can be compiled and run on another system with little or no modification.（71）

I cannot make head or tail of these instructions _____ the packet. Can you explain them to me?

Keyboard Error or no keyboard present.表示哪个配件有问题（）

Please wireless to let me know（）I am to anchor or to meet pilot.

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）

外语导游人员要精通一门外语外，还要基本掌握一门第二外语，这是（）导游的要求。

（）外语导游员要求熟练掌握一门外语，初步掌握一门第二外语。

I got angry with those people who promised to help me but did nothing.

某大学为了了解学生的英语掌握情况，就调查了外语学院大二年纪两个班的学生，这些学生英语四级通过率为75％，因此得出结论：该校学生英语能力为良好，这个结论是合理的。

______no air or water, there would be no life in the world.

Banks have no liability for any delay or loss caused by postal or telex failure.