涉外关系的交往技法有（）

People who do not sleep enough tend to become irritable .

在交往中，如果一方不看对方，可以表示的意思有（）

One of the greatest breakthroughs for professional women came in 1973 when the field of banking opened up for them.

Solid geometry has enabled astronomers to calculate the positions of the heavenly bodies relative to one another.

Cream of tartar 酒石 , a weak acid, can be added to egg whites to help them foam泡沫 when they are beaten

The Native American interpreter Sacajawea was a valuable member of the Lewis and dark expedition in 1805.

An oversight 遗漏 (miss, overslaugh) in proofreading often results in printed errors.

体现人际交往最基本动机的原则是（）

“影响人际关系内在因素”中的“社会因素”指的是（）