问题
单项选择题
志贺菌属的分群依据是( )
A．产生的色素不同
B．溶血现象不同
C．能否产生血浆凝固酶
D．产生的毒素不同
E．抗原结构和生化反应不同
答案
参考答案：E
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志贺菌属的分群依据是( )
A．产生的色素不同
B．溶血现象不同
C．能否产生血浆凝固酶
D．产生的毒素不同
E．抗原结构和生化反应不同
参考答案：E
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| Mrs. Brown lived alone in a small flat. She was old and didn't like 1 at all. So she was very 2 when the young man or woman in the flat moved out. A new young man moved 3 , and Mrs. Brown thought. "Well, he looks 4." But at three o'clock the next morning, she was woken up by the barking of a dog. "I've 5 heard the barking here before," she thought." It 6 be the young man's dog." So she telephoned the young man at once, 7 some unpleasant things to him, rang off the telephone and went to bed 8 he could answer. The next day Mrs. Brown's telephone rang at 9 hour of morning, and she got out of bed and answered, the 10 said to her, "I haven't got a dog, madam." | |||
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