下载APP
举一反三
【单选题】Many Americans harbor a grossly distorted and exaggerated view of most of the risks surrounding food．Fergus Clydesdale, head of the department of food science and nutrition at the University of Massac...
A.
They overlook the risks of the food they eat.
B.
They overestimate the hazards of their food.
C.
They are overoptimistic about the safety of their food.
D.
They overstate the government's interference with the food industry.
【单选题】选出不是选择线虫作研究对象的原因的一项是( )。
A.
线虫身体透明，功能不复杂
B.
线虫长度仅1毫米，细胞数量不多
C.
线虫是单细胞生物，不像哺乳动物的细胞众多
D.
线虫的特殊构造便于用显微镜观察