STM-N帧中D1~D12字节的作用是（）。 A.识别帧的起始点，以便接收端能与发送

在用伏安法测电阻的实验中，电源采用2节干电池串联，电流表接在“﹣”和“0.6”两接线柱．

（1）按照图1的电路图，将图2的元件连成电路（用笔画线代替连接用导线，连接线不要交叉）．

（2）闭合开关后，电流表和电压表的示数如图所示，则被测电阻R_x的阻值是_________ ．

The Simple Network Management Protocol (SNMP)is an  （）protocol that facilitates the exchange of management information between  （） . It is part of the Transmission Control Protocol/Internet Protocol (TCP/IP) protocol suite. SNMP enables network  （） to manage network performance, find and sole network problems, and plan for  （） . An SNMP-man-aged network consists of three key components: managed devices, （） , and network-management systems.

the exchange of management information between（）

A．network stations

B．network clients

C．network devices

D．network servers

患者，男性，36岁，右胸痛伴发热、呃逆2天。2周前行十二指肠溃疡穿孔修补术。大、小便无异常。PE：T 39.1℃，消瘦，右上腹季肋部叩击痛，肝浊音界扩大、右肺呼吸音减弱。X线腹部透视：右侧膈肌稍上抬。血常规：WBC 17.5×10⁹/L，其中N78.1%，L 20.8%。

临床拟行腹部⁶⁷Ga炎症显像，显像方法正确的是（）

A．显像前肠道准备　

B．注射后6～8小时及24小时显像，必要时加做48小时显像　

C．采集时，使用中能准直器，能峰93、184及296keV，窗宽20%　

D．必要时行腹部断层显像　

E．上述均是

Microsoft’s COM is a software (146) that allows applications to be built from binary software components. COM is the underlying architecture that forms the foundation for higher-level software services, like those provided by OLE. COM defines a binary standard for function calling between components, a way for components to dynamically discover the interfaces implemented by other components, and a mechanism to identify components and their interfaces uniquely.

OLE is a compound (147) standard developed by Microsoft. OLE makes it possible to create (148) with one application and link or embed them in a second application. Embedded objects retain their original format and (149) to the application that created them. Support for OLE is built into the Windows and MacOS Operating Systems. A (150) compound document standard developed mainly by Apple and IBM is called OpenDoc.

（146）是（）

A.architecture

B.protocol

C.procedure

D.structure