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

Eyespots, the most rudimentary eyes, are found in protozoan原生动物 flagellates 鞭毛虫 , flatworms 扁形虫 , and segmented worms片段 蠕虫 .

小组社会工作通过有目的的小组经验，协助个人增强其社会功能，以及更有效地处理个人、小组或社区的问题，是()提出的观点。

When carbon is added to iron in the proper proportions , the result is steel.

Will all those _____ the proposal raise their hands?