【单选题】The amino acid sequence of cytochrome c is exactly the same in humans and chimpanzees. There is a difference of 13 amino acids between the cytochrome c of humans and dogs, and a difference of 20 amino...
A.
Rattlesnakes apparently gave rise evolutionarily to the dog, chimpanzee, and human.
B.
Cytochrome c apparently has an entirely different function in rattlesnakes than in mammals, which explains the difference in the number of amino acids.
C.
Cytochrome c from a rattlesnake could function in a dog, but not in a chimpanzee.
D.
The human is apparently more closely related to the chimpanzee than to the dog or rattlesnake.
【判断题】乙酰苯胺重结晶热过滤时,产品是固体,滤液可以弃去。
【单选题】蛋白质的三级结构是由蛋白质的( )决定的
【单选题】有关轻微疾病的处理,下列说法错误的是( )。
B.
经机长同意,了解接近病人两到三名乘客的姓名和家庭住址
D.
根据乘客的意见决定着陆后是否需要医务方面的处理
【简答题】药品这种特殊商品的特殊性主要表现在哪些方面?
【单选题】下列选项中,关于敏感度系数的叙述正确的是( )。
A.
敏感度系数高,表示项目效益对该不确定因素敏感程度高
B.
敏感度系数低,表示项目效益对该不确定因素敏感程度高
D.
敏感度系数大于0,表示评价指标与不确定因素反方向变化
【多选题】主变电所指的是由上一级供电区域获得高压( )电能。