问题
单项选择题 A型题
下列哪种炎性介质具有化学趋化作用（）
A.组胺
B.C5a
C.C3b
D.缓激肽
E.活性氧代谢产物
答案
参考答案：B
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下列哪种炎性介质具有化学趋化作用（）
A.组胺
B.C5a
C.C3b
D.缓激肽
E.活性氧代谢产物
参考答案：B
阅读下面短文，掌握其大意，然后从21~30各题所给的A、B、C和D项中，选出最佳选项，并在答题卡上将该项涂黑。 Alfred Nobel became a millionaire and changed the ways of mining，construction，and warfare as the inventor of dynamite（炸药）. On April 12，1888，Alfred's brother Ludwig died of heart attack. A major French newspaper _21_ his brother for him and carried an article _22_ the death of Alfred Nobel. “The merchant of death is dead.”The article read. “Dr. Alfred Nobel，who became _23_ by finding ways to kill more people faster than ever before，died yesterday. ”Nobel was _24_ to find out not that he had died，but that，when his time was up，he would be thought of only as one who profited from _25_ and destruction. To make sure that he was _26_ with love and respect. Nobel arranged in his _27_ to give the largest part of his money to _28_ the Nobel prizes，which would be awarded to people who made great _29_ to the causes of peace，literature，and the sciences. So _30_ ，Nobel had to die before he realized what his life was really about.
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