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问题 单项选择题

某同学在学校运动会上采用背跃式跳高获得了冠军。若该同学身高1.70m，跳高时身体横着越过2.10m的横杆，据此可估算出他起跳时竖直向上的速度约为（）

A.7m/s

B.6m/s

C.5m/s

D.3m/s

答案

参考答案：C

判断题

电容器具有阻止交流电通过的能力。
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单项选择题

Today’s response to the data access dilemma eschews the traditional archival approach in favor of emerging standards for what are described as the documents of the future: compound documents. Product users and developers hope the latest standards effort--such as OpenDoc and Microsoft Corp.’s Object Linking and Embedding (OLE) will (26) data accessibility.
OpenDoc is a standards group (27) a common look and feel throughout documents, even though different applications are used.
OLE technologies allow Microsoft to (28) its various software products. Microsoft creates, governs and distributes the OLE capability, which is what most (29) it from the open OpenDoc approach. Thus, users can assemble (30) of varying application to create compound documents. With OLE users can, for example, embed an Excel chart in a Microsoft word report.

A．get

B．make

C．ensure

D．take
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