题目内容

Complete the passage with the appropriate form of the collocations from the followingexpressions.1. to target a(n) audience 2.to launch a new campaign3. to sponsora sports event4. to project a(n) image 5. to endorse a(n) brand 6. to make a commercialSigning a celebrity and using their star status to 1) _______________ is one of the standard advertising techniques. Tag Heuer, the watchmaker which 2) ________ a number of ______________, once had Tiger Woods under contract. Audrey Tautou has 3) ________________ for Chanel No5, which has been shown around the world.But choosing the celebrity who will 4) __________ exactly the right _______ is not always so easy, as several companies like Tag Heuer have found out. What happens when a company is about to 5) _________ a new ____________ featuring a celebrity and it suddenly finds out that they are accused of a criminal offence or involved in a scandal? While there is no doubt that most celebrity endorsements do increase sales, more and more advertisers are turning to other less risky ways of 6) __________ the __________ that they want to reach.

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关于配气机构,下列说法错误的是()。

A. 排气门早开是为了减少节流损失,晚关是为了利用气流惯性多排气
B. 进气门早开是为了利用压力自由进气,减少进气负功,晚关是为了利用气流惯行多进气
C. 气门重叠角随发动机转速的升高而减小,随转速的减小而增加
D. 一台四缸四冲程汽油机,其发火次序一般为1-4-2-3或1-2-3-4

配气相位不正时的原因,可能有()。

A. 凸轮轴装配错误
B. 凸轮、驱动齿轮磨损
C. 曲轴装配错误
D. 排气管堵塞

设某发动机的进气提前角为α,进气迟关角为β,排气提前角为γ,排气迟关角为δ,则该发动机的进、排气门重叠角为()。

A. α+β
B. β+γ
C. α+δ
D. β+δ

配气相位是用凸轮轴转角表示气门的开启与关闭时刻及开启的持续时间。

A. 对
B. 错

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