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【单选题】
场(厂)内机动车辆,是指利用动力装置驱动或者牵引的,在特定区域内作业和行驶、最大行驶速度(设计值)超过( )km/h的,或者具有起升、回转、翻转、搬运等功能的专用作业车辆。
A.
5
B.
15
C.
20
D.
30
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A.
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B.
so
C.
but
D.
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【单选题】破伤风痉挛毒素是由破伤风梭菌产生,它的致病机制是
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A.
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B.
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C.
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D.
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查看完整题目与答案
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B.
connection-oriented
C.
datagram
D.
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【单选题】由于志贺菌感染而出现典型的脓血便，是哪一种致病因素造成的
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【单选题】—Pandas are very beautiful, _______ kind of shy. Do you think so? —Sure. And they are the treasure of our country.
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or
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