绝大多数昆虫的后翅为膜翅。

单项选择题'An organisation is a social arrangement which pursues collective............................................. , which controls its own performance and which has a boundary separating it from its environment.' Which of the following words best completes this sentence?

单项选择题刺吸式口器昆虫取食时，上下颚口针交替插入寄主体内，喙管留在寄主体外。