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【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 Massa...
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】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】买来蘑菇10kg，含水量为90%．晾晒一会儿后，含水量为87.5%．（） (1)水分蒸发的速度为1kg/h，晾晒了2h． (2)水分蒸发的速度为，晾晒了2h．
A.
条件（1）充分，但条件（2）不充分.
B.
条件（2）充分，但条件（1）不充分.
C.
条件（1）和条件（2）单独都不充分，但条件（1）和条件（2）联合起来充分.
D.
条件（1）充分，条件（2）也充分.
E.
条件（1）和条件（2）单独都不充分，条件（1）和条件（2）联合超来也不充分.
【单选题】某居民从市场购得新鲜野生蘑菇，食后全家人发生毒蕈中毒，表现为恶心、呕吐、腹泻、腹痛、并出现溶血性黄疸、肝脾肿大等表现，引起这种毒蕈中毒的有毒成分是（）
A.
类树脂物质
B.
毒蝇伞
C.
光盖伞素
D.
鹿花蕈素
E.
毒肽类
【单选题】课外兴趣小组的几位同学将调查到的生物：①银杏②满江红③辣椒④河蚌⑤山鸡⑥鲫鱼⑦蘑菇进行了分类，①③⑤⑦归为一类，②④⑥为另一类。他们的分类依据是
A.
形态结构
B.
生理用途
C.
生物数量
D.
生活环境