题目

下列成语所描述的现象中，与昆虫生殖和发育无关的是(   ) A．飞蛾扑火                                                              B．作茧自缚 C．金蝉脱壳                                                              D．蜻蜓点水 答案：AThey prepared man?made rubber as a substitute________ the natural rubber that they could no longer obtain.