精子计数的稀释液中NaHCO3的主要作用是（） A.破坏白细胞 B.破坏红细胞 C.

计算机辅助拣货系统的英文简称是______。

A．CAPS
B．CAS
C．DPS
D．DAS

Eddie McKay, a once forgotten pilot, is a subject of great interest to a group of history students in Canada.
It all started when Graham Broad, a professor at the University of Western Ontario, found McKay’s name in a footnote in a book about university history. Mckay, was included in a list of university alumni who had served during the First World War, but his name was unfamiliar to Broad, a specialist in military history. Out of curiosity, Broad spent hours at the local archives in a fruitless search for information on McKay. Tired and discouraged, he finally gave up. On his way out, Broad’s glance happened to fall on an exhibiting case showing some old newspapers. His eye was drawn to an old picture of a young man in a rugby uniform. As he read the words beside the picture, he experienced a thrilling realization. "After looking for him all day, there he was, staring up at me out of the exhibiting case," said Broad. Excited by the find, Broad asked his students to continue his search. They combed old newspapers and other materials for clues. Gradually, a picture came into view.
Captain Alfred Edwin McKay joined the British Royal Flying Corps in 1916. He downed ten enemy planes, outlived his entire squadron as a WW1 flyer, spent some time as a flying instructor in England, then returned to the front, where he was eventually shot down over Belgium and killed in December 1917. But there’s more to his story. "For a brief time in 1916 he was probably the most famous pilot in the world," says Broad. "He was credited with downing Oswald Boelcke, the most famous German pilot at the time." Yet, in a letter home, McKay refused to take credit, saying that Boelcke had actually crashed into another German plane.
McKay’s war records were destroyed during World War Two air bombing on London-an explanation for why he was all but forgotten.
But now, thanks to the efforts of Broad and his students, a marker in McKay’s memory was placed on the university grounds in November 2007. "I found my eyes filling with tears as I read the word ’deceased’ next to his name," said Corey Everrett, a student who found a picture of Mckay in his uniform. "This was such a simple example of the fact that he had been a student just like us, but instead of finishing his time at Western, he chose to fight and die for his country.\

What is the text mainly about

A. The research into war history.
B. The finding of a forgotten hero.
C. The pilots of the two world wars.
D. The importance of military studies.

该企业准予在税前列支的捐赠支出为( )。

A．0

B．6万元

C．6.3万元

D．7.05万元

多种怪之中，最突出的是“自知”与“他知”的迥然不同，这样的情况也是古已有之，比如明朝的徐文长，提起青藤山人的画，几乎无人不知，无人不爱，可是他自己评论，却是字(书法)第一，诗第二，画第三。根据这段文字，下列说法中正确的是______。

A．“自知”中的“知”是认知的意思

B．文章主旨在于评论徐文长的“怪”

C．在“他知”中，徐文长的字排第一

D．“自知”与“他知”不同，并不奇怪

淬火的目的是使铝合金得到铝基的（），然后通过时效，使铝合金的饱和固溶体发生变化，达到使用性能要求。