搅拌是各种炉外精炼方法都采用的基本手段，作用有（）。 A.扩大反应界面 B.容易增氮

John tired ________after he fell off the his bike, but he failed. [ ]

A. not cry            

B. didn't cry          

C. not to cry

建筑公司因结构调整决定进行房地产开发，经市建设主管部门批复，在二道区取得了一桩土地开发建设项目。

该公司管理人员编制了工程建设活动管理程序，包括（）。

A、工程建设准备

B、施工招标

C、施工建设

D、分部工程

寡居效应通常指的是许多年迈的夫妻在失去伴侣之后也相继去世的现象。科学研究发现，40%的女性和26%的男性会在伴侣去世之后三年内死亡，已有相关研究认为，丧偶会增加人的死亡率。丧偶这样的重大变故会加深人的孤独感，而孤独感给人造成的心脏病风险与肥胖和高血压造成的风险相当。

对“寡居效应”理解最为准确的是（）

A.女性比男性更容易出现“寡居效应”

B.孤独感是造成“寡居效应”的主要原因

C.孤独感造成的死亡风险不容忽视

D.丧偶后死亡率提升的一种现象

Stress is our response to threatening or (1) events. We may experience different levels of stress depending on the (2) , meaning the events or circumstances that cause us to feel stress. Stressors can be classified into (3) main categories: (4) events, personal stressors, and (5) stressors. Cataclysmic events are major events that cause stress (6) , immediately, for a great many people at once. Personal stressors are major life events that create stress, including (7) life events. Background stressors are (8) hassles, or minor irritations, or (9) background stressors. Repeated exposure to stressors has both psychological and (10) consequences. The long- term consequence is that body tissues such as the heart and blood vessels can begin to (11) . The (12) system functions less effectively, and (13) our ability to fight off illnesses.
The General Adaptation (14) explains the sequence of physiological reactions to stress. There are three phases to G. A. S. The first is the " alarm and (15) " phase: we respond with alarm, and take (16) to remove the stressor. The second phase is the (17) stage: we fight against the stressor or try to cope with the stressor. This can lead to the third phase. (18) . The exhaustion phase may be an (19) way of trying to avoid the stressors. The body may be telling us that we need to do whatever is (20) to remove the stressor.

Stress is our response to threatening or (1) events. We may experience different levels of stress depending on the (2) , meaning the events or circumstances that cause us to feel stress. Stressors can be classified into (3) main categories: (4) events, personal stressors, and (5) stressors. Cataclysmic events are major events that cause stress (6) , immediately, for a great many people at once. Personal stressors are major life events that create stress, including (7) life events. Background stressors are (8) hassles, or minor irritations, or (9) background stressors. Repeated exposure to stressors has both psychological and (10) consequences. The long- term consequence is that body tissues such as the heart and blood vessels can begin to (11) . The (12) system functions less effectively, and (13) our ability to fight off illnesses.
The General Adaptation (14) explains the sequence of physiological reactions to stress. There are three phases to G. A. S. The first is the " alarm and (15) " phase: we respond with alarm, and take (16) to remove the stressor. The second phase is the (17) stage: we fight against the stressor or try to cope with the stressor. This can lead to the third phase. (18) . The exhaustion phase may be an (19) way of trying to avoid the stressors. The body may be telling us that we need to do whatever is (20) to remove the stressor.

木门窗安装质量标准的基本项目有（）

A、门窗框安装位置必须符合图纸的设计要求

B、裁口顺直，刨面平整光滑，开关灵活、稳定、无回弹和倒翘

C、门窗安装牢固，固定点符合设计要求

D、盖口条、压缝条、密封条的安装应尺寸一致，平直光滑，与门窗结合牢固严密无缝隙