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【单选题】
下列哪项不属于条件致病菌的致病条件A.
不洗手
B.
寄居部位的改变
C.
菌群失调
D.
免疫功能低下
E.
长期大量使用抗菌药物
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举一反三
【简答题】比较下列各组化合物的沸点高低,并说明理由 : 庚烷、 2- 甲基己烷和 3,3- 二甲基戊烷
【简答题】比较下列各组化合物的沸点高低,并说明理由。 (1) 丁烷和 2- 甲基丙烷 (2) 辛烷和 2 , 2 , 3 , 3- 四甲基丁烷 (3) 庚烷、 2- 甲基己烷和 3 , 3- 二甲基戊烷
【单选题】Could you advise me _____?
A.
which book should I read first
B.
what book should I read first
C.
that book I should read first
D.
which book I should read first
【简答题】Because of the bad weather, my mother ____ andl5. Because of the bad weather, my mother ____ andlay in bed. She ______ for a week. A. hasbeen ill was ill B. fell ill has fallenill C. fell ill ha...
【单选题】Could you advise me _____?
A.
which book should I read first
B.
what book should I read first
C.
that book 1 should read first
D.
which book I should read first
【简答题】比较庚烷、 2-甲基己烷和3,3-二甲基戊烷沸点的高低,并说明理由。
【单选题】What rule does the mother decide to set for the family?
A.
Having dinner without any electronics.
B.
Eating dinner together at home every day.
C.
Spending at least 45 minutes on dinner.
D.
Turning off all electronics during night.
【简答题】A．They decide to eat out. B．They wait for the mother to make the dinner. C．They eat at friend's house. D．They eat something different at home.
【单选题】Could you advise me _____?
A.
that the teacher said
B.
what did the teacher say
C.
that did the teacher say
D.
what the teacher said
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