在我国使用范围最广、生物活性最高的抗生素类杀虫剂是(),其作用靶标是伽马氨基丁酸手体。
参考答案:阿维菌素
Many people who saw the film were afraid to swim in the sea when they remembered the
scenes ________ people were eaten by the shark. [ ]
A. where
B. that
C. which
D. when
以政府调研员的身份,用不超过350字的篇幅,提出解决给定材料所反映问题的方案。要有条理地说明,要体现针对性和可操作性。