________ did the United States launch the war against Iraq? A.For what purpose B.For which purpose C.For the purpose of D.On purpose 答案:A for what purpose“为了……目的”,表疑问;for the purpose of“为了……的目的”;on purpose“故意地”。题意:美国为了什么目的发动了伊拉克战争? 利用人工合成的昆虫性外激素可以诱捕相应的农业害虫.(判断对错)