．FDA can ask for the proof of safety and effectiveness of a product ________.

A． if it is a drug

B． if it is a device

C． if its consumers make complaints

D． if its distributors challenge FDA’s authority

[单选题]27． Who can you ask for help when your parents quarrel?A． Grandparents．B． Uncles．C． Neighbors or teachers．D． A．B and C．

[多选题] “Proof”是（）的表示方法。A . 标准酒度B . 英制酒度C . 美制酒度D . 法制酒度

[单选题]What does the proof test load of an anchor chain demonstrate?（）A . Breaking strength of the chainB . Strength of the chain to a specified limitC . Adequate holding power for new bottom conditionsD . Safe working load of the chai

[单选题]An air waybill is a proof signed by（ ）for acceptedcargo.A.the carrierB.the

[单选题]An air waybill is a proof signed by（ ）for acceptedcargo.A.the carrierB.the

[单选题]safety beltA．安全带B．安全帽C．救生衣D．安全网

[单选题]safety netA．安全措施B．安全网C．安全帽D．安全防护

[单选题]Industrial safety does not just happen.Companies with low accident rates pl

[单选题]E．quipment not ______ official safety standards has all been removed from the workshop.A． conforming to B consistent with C predominant over D providing for

[单选题]F．or the sake of the safety, many parents send their kids to school ________.A． by carB． by busC． by trainD． by public transport