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【判断题】
在逻辑无环流调速系统中,必须由逻辑无环流装置DLC来控制两组脉冲的封锁和开放。当切换指令发出后,DLC便立即封锁原导通组脉冲,同时开放另L组脉冲,实现正、反组晶闸管的切换,因而这种系统是无环流的。 ( )A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】What function does the first sentence in the second paragraph serve?
A.
It further explains the theory of utilitarianism.
B.
It forms a contrast to general cases of utilitarianism.
C.
It acts as the connecting link to bring up the theme.
D.
It gives an example to explain utilitarianism in particular cases.
【单选题】What point does the professor make about the snow that forms a glacier?
A.
It is conserved.
B.
It is light and fluffy.
C.
It is denser than ice.
D.
It is very dirty.
【单选题】To what rights does the Declaration of Independence say all men are entitled?
A.
Life，liberty and pursuit of happiness．
B.
Freedom of Speech and Press．
C.
Freedom of Thought and Education．
D.
Abolishing all evil forms
【判断题】( )企业与客户签订合同,向其销售商品并提供安装服务,若安装服务复杂且商品需要按客户定制要求修改,则合同中销售商品和提供安装服务合并为单项履约义务。
A.
正确
B.
错误
【多选题】Look at this picture, what forms of personal protective equipment(个人防护装备) does the man use?
A.
gloves
B.
overalls
C.
face shields
D.
goggles
E.
respirators
【简答题】简单叙述一下模板的优缺点
【简答题】What does the sentence "Forms and patterns meant nothing" (para. 8) reveal about the outlook of the frontiersmen?
【单选题】What does the author mean by “benign forms of convenience”?
A.
Useful function
B.
Reading apps
C.
Reference tools
D.
Search features
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