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【单选题】
关于痢疾杆菌，下列哪项是正确的A.
为革兰阴性杆菌，有鞭毛
B.
在外界生存时间甚短
C.
对理化因素抵抗力强
D.
产生外毒素和内毒素
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举一反三
【单选题】Some people argue using _____ nature to meet our own needs may spell disaster, unless we start to look around and understand how ______ clean environment benefits us all.
A.
/; a
B.
the; the
C.
the; a
D.
a; a
【简答题】 Section D 16. What is the purpose of the video library? To help people improve their abilities. 17. What problem may people have when using the library for the first time? They may have difficulties...
【单选题】下列有关神经元的叙述中，正确的是 [ ]
A.
神经元细胞体主要分布在中枢神经系统里
B.
神经元的突起只分布在周围神经系统里
C.
脊髓的白质主要由神经元细胞体构成
D.
神经中枢包括脑神经和脊神经
【单选题】Some people argue using _______ nature to meet our own needs may spell disaster, unless we start to look around and understand how _________ clean environment benefits us all.
A.
the; a
B.
the; the
C.
/; a
D.
a; a
【简答题】What is the purpose of the video library? To help people improve their abilities. 17. What problem may people have when using the library for the first time? They may have difficulties understanding ....
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