统计的过程也是对客观事物的认识过程，从统计的认识对象看，其特点主要有______。

下面短文中有10处错误。请在错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏词符号（＾）,并在其下面写上该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1.每处错误及其修改均仅限一词。

只允许修改10处，多者(从第11处起)不计分。

It was 7:15 in the morning of February 8, 2007．I was walking along Park Road towards the east while an old man came out of the park on the other sides of the street. Then I saw a yellow car drive up Third Street and made a right turn into Park Road. The next moment the car hit the man while she was crossing the road．He fell with a cry．The car didn’t stop and drive off at full speed heading west．I noticed the driver was young woman wore a pair of glasses and the plate number was AC864．After two minutes later, I stopped a passed car and took the old man to the nearest hospital

下列属于五劳的有（）

A.心劳

B.肝劳

C.脾劳

D.胃劳

E.肾劳

泵轴被卡死的原因是什么？如何排除？

设X₁，X₂，…，X_n是相互独立的随机变量，且X_i(i=1，2，…，n)服从参数为λ的泊松分布，则

=______．

多云阴雨的白天，气温较低，主要是因为大气的（）

A.吸收作用强

B.反射作用强

C.散射作用弱

D.保温作用弱