搜题请搜索小程序“爱下问搜题”
问题 单项选择题

主要用于样本含量n≤30以下、未经分组资料平均数计算的是（）。

A.加总法

B.几何法

C.加权法

D.直接法

答案

参考答案：D

解析：加权法对于样本含量n≥30以上且已分组的资料。

单项选择题

直肠癌，下列哪种情况不必做术后放射治疗（）

A.根治切除，淋巴结转移 

B.根治切除，浆膜受累 

C.根治切除，肿瘤侵及浅肌层 

D.根治切除，肿瘤侵及深肌层 

E.局部切除
查看答案
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.

（29）是（）

A.divide

B.distinguish

C.divides

D.distinguishes
查看答案