对一职工食堂用称重法进行膳食调查，下面是一次中餐的称重调查结果，进餐人数60人（皆为

It’s impossible to determine how many people would have lost their lives without the contribution of African-American inventor Dr Charles Drew.

Charles Drew was born on June 3, 1904, in Washington, DC. His early interest was in education, but he was also an outstanding athlete. While in college, he was awarded as the man who contributed the most to sports during his four years in school. Drew’s sister Elsie suffered from tuberculosis(肺结核) and died in 1920. Her death influenced his decision to study medicine.

After becoming a doctor and working as a college instructor, Drew went to Columbia University, where he earned his Doctor of Medical Science degree. During this time he became involved in research on blood and blood transfusions.

At Columbia, he wrote a paper on “banked blood”, in which he described a technique he developed for the long-term preservation of blood plasma. Before his discovery, blood could not be stored for more than two days because of the rapid breakdown of red blood cells. Drew had discovered that by separating the plasma from the whole blood and then refrigerating them separately, they could be combined a week later for a blood transfusion. Drew became the first African American to receive a PhD in medical science.

After World War II broke out, Drew was called upon to put his techniques into practice. He was named a project director for the American Red Cross but soon quit his post after the government issued an order that blood taken from white donors should be separated from that of black donors.

On April 1, 1950, after he attended the annual free clinic at the John A. Andrew Memorial Hospital, he and other three physicians decided to drive back home. As he was tired from spending the night before in the operating room, he lost control of his car. Drew was badly injured and was taken to Alamance General Hospital in Burlington, North Carolina. He was pronounced dead half an hour after he first received medical attention. Drew's funeral was held on April 5, 1950, at the Nineteenth Street Baptist Church in Washington, DC.

But contrary to popular thought, he was not refused a blood transfusion by an all-white hospital. He indeed received a transfusion but was beyond the help of the doctors attending to him. As Dr. John Ford, one of the doctors who survived the accident, later explained, “We all received the very best of care. The fact that he was a Black did not in any way limit the care that was given to him.” Over the years, Drew has been considered one of the most honored figures in the medical field.

小题1:According to the passage, ________ might have contributed to the invention of blood banks.

A．the combination of blood cells

B．the rapid breakdown of red blood cells

C．the development of refrigerating technique

D．the technique of separating plasma from the whole blood小题2:By saying “contrary to the popular thought” in the last paragraph, the writer _______.      

A．can’t understand the doctors’ decision

B．indicates his concern about the popular thought

C．feels disappointed with the all-white hospital

D．means what the doctors did was out of expectation小题3:We can learn from the passage that Dr Charles Drew is best remembered by people as _______.       .

A．an outstanding athlete

B．a college instructor

C．a medical researcher

D．a project director小题4:What conclusion can we draw from the passage?

A. Charles Drew died in a medical accident.

B. African Americans were still treated unfairly in the 1940s.

C. Charles Drew was the first African American to receive a PhD.

D. Physicians refused to give Charles Drew medical attention because he was a black.

小题5:In which section of a magazine can we most probably find the passage?

A．People

B．Health

C．Culture

D．Entertainment

可用作崩解剂的是

A．邻苯二甲酸醋酸纤维素
B．阿拉伯胶浆
C．滑石粉
D．淀粉
E．水

细菌的合成代谢产物有（）

A.热原质

B.毒素与侵袭性酶

C.维生素

D.色素

E.细菌素

钢轨为什么做成宽底式工字型断面？

在装配和工件的小批量生产中常采用（）的方法，它们能简便而又准确的完成划线任务。

A.仿划线

B.配划线

C.样板划线

D.单独划线