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【单选题】
以下病原体抵抗力最弱的是A.
钩端螺旋体
B.
梅毒螺旋体
C.
普氏立克次体
D.
恙虫病立克次体
E.
真菌
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反馈参考答案：
举一反三
【单选题】Decide which examples are from a conversation and which are from an academic paper. (1)
A.
from a conversation
B.
from an academic paper
【简答题】无砟道床分为CRTSⅠ型板式、CRTSⅡ型板式、双块式以及道岔区（）和板式无砟道床等。
【单选题】Decide which examples are from a conversation and which are from an academic paper. (5)
A.
from a conversation
B.
from an academic paper
【单选题】听力原文：W: Hello, Kevin. I haven't seen you for many days. What's the problem with you? M: Actually I'm a little embarrassed about coming here. I feel fine right now. (23)But you know, every year around ...
A.
He gets ill at the same time every year.
B.
He doesn't get enough exercise.
C.
He often has difficulty sleeping.
D.
He's sick with influenza throughout the winter.
【简答题】作动筒属于飞机液压系统的( )元件。
【单选题】Decide which examples are from a conversation and which are from an academic paper. (6)
A.
from a conversation
B.
from an academic paper
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