高度危险性物品不包括A．吸氧管B．导尿管C．手术器械D．穿刺针、输血器材、输液器材E

某商店准备进一批季节性小家电，进价每个40元，经市场预测，售价为每个52元时，可售出180个；当每个小家电的售价增加x（0≦x≦10）元时，销售量p（个）与x的函数关系式为p=180﹣10x。

（1）若p=150，那么每个小家电的售价应定为（    ）元；

（2）若商店准备获利2000元，求x的值是多少元？

某旋转件的平衡精度等级为G16，则表示平衡后的（）。

A．偏心速度许用值为16mm/s 

B．偏心速度许用值为1．6mm/s 

C．偏心距为16mm 

D．不平衡量为16 

阅读理解。

     School failure appears to trouble teenage girls more deeply than boys, US researchers said on Tuesday.

     They said adolescent (青春期的) girls who are dismissed or drop out of high school before they graduate

are more likely to have a serious depression by age 21 than boy with similar experiences.

     "For girls it is more serious to be school failure," said Carolyn McCarty, a University of Washington

researcher whose study appears in the Journal of Adolescent Health.

     "We already know that it leads to more poverty, higher rates of being on public assistance and lower rates

of job stability. And now this study shows it is having mental health implications for girls," McCarty said in a

statement.

     The study was drawn from data on more than 800 people in Seattle, Washington,and included people from

18 school in high-crime neighborhoods.

     The group was separated evenly by gender (性别) and nearly half were white, 24 percent were black, 21

percent were Asian-American and the rest were from other groups.

     Overall, 45 percent of the girls and 68 percent of the boys in the study experienced a major school failure,

but 22 percent of the girls later became depressed compared with 17 percent for the boys.

     "This gender shows that while school failure is more typical for girls, it appears to have more severe

consequences when it does occur," McCarty said.

1. What is the purpose of writing this article? [ ]

A. Taking good care of the school boys.

B. Asking the US researchers to search more evidences.

C. Giving help to the graduated students.

D. Paying more attention to the girls experiencing school failure.

2. Carolyn McCarty is _____.[ ]

A. a scientist

B. a researcher

C. a professor

D. a student

3. The underlined word "it" in Para. 4 means _____. [ ]

A. school failure

B. a adolescent girl

C. a school boy

D. a university

专业承包企业资质按专业类别共分为( )个资质类别。

A．12
B．30
C．50
D．60

深圳某企业进口若干台1980年制造的旧机电产品，需提供深圳经济特区机电产品进出口办公室批件方准入境。( )