RS-232是（）之间的接口标准，是目前各国厂家广泛使用的国际标准。A.硬件 B.软

对因瓦斯浓度超限被切断电源的电气设备，必须在瓦斯浓度降到（）％以下时，方可通电开动。

A、0.5

B、0.75

C、1.0

D、1.5

It's already seven thirty. It's time _____ me _____ go home. [ ]

A. for; to

B. of ; to

C. from; to

D. at; to

女，17岁。学生，患1型糖尿病5年，一直使用胰岛素治疗。近日学校体能测试，加大了运动量，病人出现心悸、出汗、头晕、手抖、饥饿感。

下列关于1型糖尿病发病原因的陈述错误的是（）

A.与遗传因素有关

B.与病毒感染有关

C.与机体自身免疫反应有关

D.与细胞免疫有关

E.与缺乏体力活动有关

进出口食品标签审核若品种及规格相同，工艺及包装形式不同时可以合并提出申请。（）

The (1) is a general description of the architecture of a workflow management system used by the WFMC, in which the main components and the associated interfaces are summarized. The workflow enactment service is the heart of a workflow system which consists of several (2) . In a workflow system, a process is specified using the process definition tool. Usually, processes are defined in terms of a (3) , which consists of (4) indicated using a circle, and (5) shown as a rectangle. These two components can be linked by means of a directed arc.

1（）

A．evolutionary model

B．workflow reference model

C．waterfall model

D．spiral model