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【简答题】
学校组织5名学生参加区级田赛运动会，规定每人在跳高、跳远、铅球3个项目中 任选一项，假设5名学生选择哪个项目是等可能的． （Ⅰ）求3个项目都有人选择的概率； （Ⅱ）求恰有2个项目有人选择的概率．
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【简答题】<某小区业主李某深夜在小区内被不法分子袭击受伤。李某以某物业服务企业未尽物业服务职责，安防人员不合格导致小区不安全，业主人身受到伤害为由将某物业服务企业告上法庭，要求物业服务企业赔偿医疗费、交通费、误工费、营养费、护理费及精神损失费共计83500元人民币。某物业公司辩称，物业服务保安服务的范围是指为维护物业服务区域的公共秩序而配合公安机关实施的防范性安全保卫活动，其在进行物业服务时，并不负有保证每...
【简答题】<某小区业主李某深夜在小区内被不法分子袭击受伤。李某以某物业服务企业未尽物业服务职责，安防人员不合格导致小区不安全，业主人身受到伤害为由将某物业服务企业告上法庭，要求物业服务企业赔偿医疗费、交通费、误工费、营养费、护理费及精神损失费共计83500元人民币。某物业公司辩称，物业服务保安服务的范围是指为维护物业服务区域的公共秩序而配合公安机关实施的防范性安全保卫活动，其在进行物业服务时，并不负有保证每...
【简答题】Lead（铅） deposits, which accumulated（增加） in soil and snow during the 1960's and 70's, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that t...
【单选题】Lead deposits, which accumulated in soil and snow during the 1960's and 70's, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clea...
A.
the Clean Air Act has not produced the desired results.
B.
lead deposits in arctic snow on the increase.
C.
lead will stay in soil and snow longer than expected.
D.
the U.S. is the major source of lead pollution in arctic snow.
【简答题】试使用T-SQL命令创建一个名为TEST1的数据库,数据库文件保存在“d:\Data”文件夹中,数据文件名称为TEST1_Data,其磁盘文件名为TEST1_Data.mdf。事务日志文件名为TEST1_Log,其磁盘文件名为TEST1_Log.ldf。两个文件夹都属于PRIMARI文件组,初始大小为10MB,文件最大可达50MB,文件每次可增长2MB。
【单选题】Lead deposits, which accumulated in soil and snow during the 1960's mid 7O's, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clea...
A.
the Clean Air Act has not produced the desired results
B.
lead deposits in arctic snow are on the increase
C.
lead will stay in soil and snow longer than expected
D.
the US is the major source of lead pollution in arctic snow
【单选题】George is very proud of his new status in the company.
A.
statue
B.
office
C.
state
D.
professional position
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