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【单选题】
以下关于相关系数的论述，正确的是A.
相关系数具有线性不变性
B.
相关系数用来衡量的是线性相关关系
C.
相关系数仅能用来计量线性相关
D.
以上都正确
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【单选题】某地区近年来每逢夏季就有一种传染病流行，且多发生于儿童，主要表现为发热头痛，呕吐，第3～4天出现意识障碍，严重者伴抽搐及呼吸异常，经治疗后多数人于病程2周后痉愈，5～20%重症病人留有神经系统后遗症，病死率约为3～10%，为预防该病再度流行，在其综合性预防措施中，应以下列哪项为主
A.
控制和管理好病人
B.
控制和管理好病猪
C.
防蚊和灭蚊
D.
防蚊灭蚊和预防注射
【简答题】按从动件的运动方式不同凸轮机构分为___和___。
【单选题】Thousands of workers in the small town are______since the car factory has closed down.
A.
idol
B.
idiot
C.
ideal
D.
idle
【单选题】Economy of the world in 2010 was not so good. Many small companies ______. [ ]
A.
closed up
B.
drew up
C.
picked up
D.
grew up
【单选题】______ the money shortage, many small companies closed down. [ ]
A.
As a result of
B.
As a result from
C.
Resulted in
D.
As a result
【简答题】按从动杆的运动方式不同,凸轮机构分为 _________ 从动件凸轮机构和 _________ 从动件凸轮机构。
【单选题】_______the money shortage, many small companies closed down.
A.
As a result from
B.
As a result
C.
Resulted in
D.
As a result of
【单选题】Some small chemical plants in Industrial Park will be closed down within half a year according to a decision _______ yesterday. [ ]
A.
making
B.
made
C.
to be made
D.
to make
【单选题】The small factory on the street______for lacking of materials.
A.
closed down
B.
closed in
C.
closed to
D.
closed with
【单选题】Alison closed the door of her small flat and put down her briefcase. As usual, she had brought some work home from the travel agency. She wanted to have a quick bite to eat and then, after spending a ...
A.
Afraid.
B.
Irritated.
C.
Pleased.
D.
Curious.
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