试述黏附分子的生物学功能。

孕妇，孕3产0，现妊娠37周。自诉 * * 无痛无诱因出血3d。在检查项目中能协助确诊的检查是（）。

A.肛查

B.妇科内诊

C.B超检查

D.腹腔镜

E.基础体温测定

（）也叫“正书”、“真书”。因其形体方正，笔画平直可做楷模，故名。

One of the difficulties in building an SQL-like query language for the Web is the absence of a database （） for this huge, heterogeneous repository of information. However, if we are interested in HTML documents only, we can construct a virtual schema from the implicit structure of these files. Thus, at the highest level of （） , every such document is identified by its Uniform Resource Locator (URL), has a （） and a text. Also, Web servers provide some additional information such as the type, length, and the last modification date of a document. So, for data mining purposes, we can consider the set of all HTML documents as a relation: Document(url, title, text, type, length, modif)Where all the （） are character strings. In this framework, an individual document is identified with a （） in this relation. Of course, if some optional information is missing from the HTML document, the associate fields will be left blank, but this is not uncommon in any database.

has a （） and a text

A．table

B．title

C． driver

D．event

可能导致呼吸道分泌物增多的麻醉药有（）

A.乙醚

B.七氟烷

C.丙泊酚

D.恩氟烷

E.羟丁酸钠

变更或修订材料计划的情况中，下列（）不属于任务量变化引起的。

A.在项目实施过程中，由于技术革新，增加了新的材料品种

B.设计变更必然引起工艺变更，材料消耗可能与原来不一样，材料计划也要相应调整

C.图纸和技术资料尚不齐全情况下，材料实际需要与原概算有出入，需要调整材料计划

D.在工具和设备修理中，实际修理所用的材料与原计划中申请的材料有出入