问题
单项选择题
对人体来说细菌的菌体抗原属于（）
A.自身抗原
B.异种抗原
C.同种异型抗原
D.异嗜性抗原
E.半抗原
答案
参考答案：B
解析：异种抗原是与宿主不是同一种属的抗原物质，与医学有关的异种抗原主要有：病原微生物、细菌外毒素和内毒素、抗毒素、异嗜性抗原。
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对人体来说细菌的菌体抗原属于（）
A.自身抗原
B.异种抗原
C.同种异型抗原
D.异嗜性抗原
E.半抗原
参考答案：B
解析：异种抗原是与宿主不是同一种属的抗原物质，与医学有关的异种抗原主要有：病原微生物、细菌外毒素和内毒素、抗毒素、异嗜性抗原。
Mrs. Ball had a son. His name was Mick. She 26 him very much and as（因为）he was not a 27 child, she was always afraid that he might 28 ill. 29 she usually took him to see the best 30 in the town four times a year and asked the doctor to look 31 the son. During one of these 32 , the doctor gave Mick all kinds of tests(检查) and then said to him, “Do you have any trouble with your nose or ears ?” Mick 33 for a second and then answered, “Yes, I 34 _.” Mrs. Ball was very 35 . “But I’m sure you have 36 told me that, Mick!” she said worriedly. “Oh, really?” said the doctor 37 . “And what trouble do you have 38 your nose and ears, my boy?” “Well,” answered Mick. “I always have trouble with them when I’m 39 my sweater off, 40 the collar (领子) is very tight (紧的).”
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