严重吸气性呼吸困难最主要的特点是A．端坐呼吸 B．呼吸加深加快 C．哮鸣音 D．三凹

提升居民幸福指数，让百姓共享更多发展成果，已成为各地“两会”的共识。北京提出“让人民过上幸福美好的生活”，广东提出“把保障和改善民生作为建设幸福广东的出发点和落脚点”……让人民生活更幸福，国家就必须 [ ]

①确立按劳分配，提供制度保障

②增加财政收入，减少财政支出

③促进经济增长，增加社会财富

④提高保障水平，让百姓安居乐业

A．①③  

B．②③  

C．①④  

D．③④

下列短文的划线部分是错误的，请将其正确答案书写在后面的横线上。

How do North Americans dress? What do they wear in special              1      

days? In fact, there is very few formal days, though there are some             2_______

festivals such as Easter, Christmas, Halloween, or Thanksgiving               3      

Day. What people wear depend on their likes and dislikes. On birthday,         4      

some child wear paper party hats. At Christmas, some people wear             5      

Santa Claus hats. In winter, Canada people usually wear coats, gloves,         6      

boots and hats. It is near the same in northern China. Generally, people          7        

in Canada and the United States wear suits for work in offices, as             8      

well as for most formal occasions, just as people do in China. People           9      

in cities around a world wear rather similar clothes.                         10

图2所示的实例中，符合安全用电要求的是[ ]

A.

可作为乙脑早期诊断的检查方法是（）

A.特异性IgM抗体检测

B.补体结合试验

C.血凝抑制试验

D.病毒分离

E.中和试验

在空调系统中加湿或除湿，其主要的目的是调节空气中的（），给人们以舒适感。

A.相对湿度

B.过热度

C.干度

D.过冷度