【单选题】已知函数f(x)= 在区间(-2,+∞)上为增函数,则实数a的取值范围是 [ ]
【单选题】男性,41岁。上腹隐痛伴反酸、嗳气2个月,上腹部轻度压痛,大便隐血试验阳性。经治疗一周后,病人症状缓解,复查大便隐血试验为阴性。出院前护土对病人进行健康指导,其中正确的是
【单选题】已知函数f(x)=x 2 -2ax+3在区间(-2,2)上为增函数,则a的取值范围是( )
【简答题】What is the long-term benefit of the new P.E program?
【单选题】已知f(x)是偶函数,且f(x)在[0,+∞)上是增函数,如果f(ax+1)≤f(x-2)在 x∈[ 1 2 ,1] 上恒成立,则实数a的取值范围是( )
【多选题】依法取得_____的企业,凭相应的许可证件购买剧毒化学品。
【单选题】经营剧毒化学品和其他危险化学品的,要凭( )向工商行政管理部门办理登记注册手续。
【单选题】Ad Watcher Ad Watcher is our new e-mail alert service. Hundreds of new listings are added daily to the Bargain News. With Ad Watcher, you will be informed daily when new listings that match your searc...
A.
A home security system.
B.
An e-mail alert service.
C.
A diet and exercise program.
D.
An environmental protection group.