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【单选题】
以下关于痢疾杆菌的陈述，哪一项是正确的
A.
我国国内流行最多的是痢疾志贺菌
B.
痢疾杆菌有O、K和H3种表面抗原
C.
根据O抗原构造，痢菌可分为4群
D.
细菌性痢疾已有理想的活菌苗预防
E.
致病主要靠外毒素
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举一反三
【判断题】投影面垂直面可分为铅垂面、正垂面两种。
A.
正确
B.
错误
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【判断题】土壤发生学是道库恰耶夫创立的,他从形成土壤的因素入手分析,即认为土壤是气候、生物、母质、地形和时间等综合作用的产物。()
A.
正确
B.
错误
查看完整题目与答案
【判断题】土壤是气候、生物、母质、地形和时间等成土因素综合作用的产物,土壤是一个独立自然体。
A.
正确
B.
错误
查看完整题目与答案
【单选题】The Internet is based on which three key technologies?
A.
The Internet is based on which three key technologies?
B.
Client/server computing, packet switching, and HTTP
C.
Client/server computing, packet switching, and the development of communications standards for linking networks and computers
D.
TCP/IP, HTML, and HTTP
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【判断题】道库恰耶夫创立了土壤发生学，从形成土壤的因素入手分析，即认为土壤是气候、生物、母质、地形和时间等综合作用的产物。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】With multimedia technologies, people can do the following EXCEPT
A.
throwing away their radios and TVs.
B.
holding meetings or talking with others far away.
C.
learning new concepts and technologies more easily
D.
working more effectively with powerful office applications.
查看完整题目与答案
【判断题】投影面垂直面可分为铅垂面、正垂面两种。(还有侧垂面)
A.
正确
B.
错误
查看完整题目与答案
【单选题】下列哪种动物的正常尿液是混浊的()
A.
犬
B.
马
C.
牛
D.
猪
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【多选题】Alternate dust control technologies
A.
Ventilated cutting drums
B.
Foam discharge from shearer drum
C.
Foam discharge from shearer drum
D.
Low-pressure inward-facing drum sprays
查看完整题目与答案
【单选题】Which of the following is true of push and pull technologies?
A.
The early Web was characterized by pushing static information.
B.
In push technologies, organizations provide users with standardized information.
C.
In pull technologies, organizations provide users with customized information based on each user's individual profile.
D.
In pull technologies, users research, find, request, and retrieve the information they want.
查看完整题目与答案
相关题目：
【判断题】投影面垂直面可分为铅垂面、正垂面两种。
A.
正确
B.
错误
查看完整题目与答案
【判断题】土壤发生学是道库恰耶夫创立的,他从形成土壤的因素入手分析,即认为土壤是气候、生物、母质、地形和时间等综合作用的产物。()
A.
正确
B.
错误
查看完整题目与答案
【判断题】土壤是气候、生物、母质、地形和时间等成土因素综合作用的产物,土壤是一个独立自然体。
A.
正确
B.
错误
查看完整题目与答案
【单选题】The Internet is based on which three key technologies?
A.
The Internet is based on which three key technologies?
B.
Client/server computing, packet switching, and HTTP
C.
Client/server computing, packet switching, and the development of communications standards for linking networks and computers
D.
TCP/IP, HTML, and HTTP
查看完整题目与答案
【判断题】道库恰耶夫创立了土壤发生学，从形成土壤的因素入手分析，即认为土壤是气候、生物、母质、地形和时间等综合作用的产物。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】With multimedia technologies, people can do the following EXCEPT
A.
throwing away their radios and TVs.
B.
holding meetings or talking with others far away.
C.
learning new concepts and technologies more easily
D.
working more effectively with powerful office applications.
查看完整题目与答案
【判断题】投影面垂直面可分为铅垂面、正垂面两种。(还有侧垂面)
A.
正确
B.
错误
查看完整题目与答案
【单选题】下列哪种动物的正常尿液是混浊的()
A.
犬
B.
马
C.
牛
D.
猪
查看完整题目与答案
【多选题】Alternate dust control technologies
A.
Ventilated cutting drums
B.
Foam discharge from shearer drum
C.
Foam discharge from shearer drum
D.
Low-pressure inward-facing drum sprays
查看完整题目与答案
【单选题】Which of the following is true of push and pull technologies?
A.
The early Web was characterized by pushing static information.
B.
In push technologies, organizations provide users with standardized information.
C.
In pull technologies, organizations provide users with customized information based on each user's individual profile.
D.
In pull technologies, users research, find, request, and retrieve the information they want.
查看完整题目与答案