问题
单项选择题
异嗜性抗原是
A．来源于人体的抗原物质
B．同种间不同个体的特异性抗原
C．合成抗原
D．一类与种属特异性无关的存在于人与动物、植物、微生物之间的交叉抗原
E．针对自身成分的抗原
答案
参考答案：D
解析：异嗜性抗原的概念。
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异嗜性抗原是
A．来源于人体的抗原物质
B．同种间不同个体的特异性抗原
C．合成抗原
D．一类与种属特异性无关的存在于人与动物、植物、微生物之间的交叉抗原
E．针对自身成分的抗原
参考答案：D
解析：异嗜性抗原的概念。
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| One day a young officer (军官) was at a station. He was 1 his way to visit his mother in 2 town. He wanted to 3 her and tell her 4 his train would arrive. In this way she could meet him at the station in her car. He looked in his 5 but couldn't find the 6 money for the telephone, so he went 7 to ask for help. An old soldier happened to pass by. The officer 8 him and asked, "Have you got any change (零钱) for ten pence (便士)?" "Wait a moment," the soldier answered while he was looking for the money in his pocket. "Don't you know how to speak to an officer?" the officer said 9 . "Now, let's start again. Have you got any change for ten pence?" " 10 , sir," the old man answered quickly. | ||||
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