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【单选题】
PLC梯形图中在( )情况先允许双线圈输出。A.
基本指令
B.
延时指令
C.
梯形图
D.
跳转指令
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知识点：
皮皮学刷刷变学霸
举一反三
【单选题】为了使螺栓均匀受力减少零件变形并使零件间隙配合紧密,拆卸螺栓时应该( )
A.
按对角的方向从里向外拆
B.
按对角的方向从外向里拆
C.
从里向外随意拆装
D.
从外向里随意拆
【简答题】A．The woman has waited for an hour. B．The woman will be interviewed. C．The woman has no job. D．The woman doesn't like waiting.
【单选题】According to the woman, how can she deal with difficulties?
A.
She has a great husband.
B.
She has a good career.
C.
She has a great family.
D.
She is undaunted to whatever may come in the way.
【多选题】关于HEV叙述，正确的是
A.
为单正链RNA病毒
B.
可在患者粪便标本中检测到病毒体
C.
尚不能在细胞培养中复制
D.
目前临床诊断常用检测抗HEV-IgM
E.
不形成慢性感染
【单选题】How has the number of working woman with college degrees in the united States changed
A.
It has increased 57 percent since 2011.
B.
It has increased 200 percent since 1970.
C.
It has reached 65 million in 1964.
D.
It has increased 46 million since 1964.
【单选题】How much work has the woman finished?
A.
Only a half
B.
Most of it.
C.
A little of it.
【单选题】What does the woman want to know?
A.
Whether the man has got some cold medicine.
B.
How effective is the hot line service.
C.
Whether the man has got suitable clothes.
D.
How long the man has been in this city.
【单选题】关于抗HBc IgM,正确的叙述是
A.
由HBV的表面抗原刺激产生
B.
阳性具有早期诊断价值
C.
有抗HBV感染作用
D.
在血清中可长期存在
E.
阳性表示疾病趋向恢复
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