皮皮学，免费搜题
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【单选题】
如果想要复制PDF文档中的一部分内容，需要使用下列哪一种工具按钮？A.
文本和图像选择工具
B.
手形工具
C.
放大按钮
D.
缩小按钮
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
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皮皮学刷刷变学霸
举一反三
【单选题】下列关于布线的线缆选用的说法正确的是 ( )
A.
语音信道在水平子系统中一般采用五类大对数双绞线
B.
数据通信信道在水平子系统中一般采用超五类或六类双绞线
C.
在室内宜采用高带宽的单模光纤
D.
水平布线系统多采用 25 对大对数双绞线
【简答题】Hello, this is David Austin with the BBC news. —1—is beginning a 2-day meeting in Geneva aimed at —2—the global response to —3—. From Geneva, here's Imogen Foulkes. There's a lot the health experts do...
【简答题】水平子系统也称__,这个系统若使用双绞线,一般要求在__范围内,如果超过90m,应使用__布线。
【简答题】No one really wants to think about it, but we all need to learn how to 1 our finances. It can be difficult to 2 , and yet it is an essential skill for 3 the pressures of hood. However much we wou...
【单选题】下列关于布线的线缆选用的说法正确的是( )。
A.
语音信道在水平子系统中般采用五类大对数双绞线。
B.
数据通信信道在水平子系统中一般采用超五类或六类双绞线。
C.
在室内宜采用高带宽的单模光纤
D.
水平布线系统多采用25对大对数双绞线
【简答题】Why I Refused to Buy My Child a Mobile Phone 1 Every five minutes my children ask me for the “latest thing”. They tell me that all their friends have it already and they can’t live without it. Our hou...
【简答题】Anna I must go shopping 1 . But I really have no time. Stella What do you need to buy? Anna It is my daughter’s birthday next week and she wants a new bicycle. Stella Why don’t you look 2 ? You can fi...
【简答题】Reading in Depth: There is a short passage with 10 blanks. You are required to select one word or phrase for each blank from a list of choices given in the word bank following the passage. Read the p...
【多选题】虽然在经济型订单批量模型中,我们假设订货至交货周期为零,但实际上,很多时候这个周期不会零,因为:
A.
进行订单准备工作需要时间
B.
把订单准确送抵供应商的相关部门需要时间
C.
供应商需要一定的准备时间
D.
供应商把货物运抵目的地需要时间
E.
对运抵货物进行处理需要时间
【单选题】No one wants you to be _______ but we really want you to do your best always.
A.
proud
B.
perfect
C.
polite
D.
popular
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