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【多选题】
In plant and animal systems, is it the same of the definition and inclusion for essential elements? Why?A.
The definition and inclusion for essential element are not the same in plant and animal systems.
B.
Because the trace elements essential for plants are those elements which cannot be substituted by others in their specific biochemical roles and that have a direct influence on the organism so that it can neither grow nor complete some metabolic cycle.
C.
In general, B, Co, Cu, Fe, Mn, Mo, Si and Zn are known to be essential for plants, whilst Al, As, Br, F, I, Li, Ni, Rb, Se, Sr, Ti and V are known to be essential for some groups or species. In human and animal systems, trace elements are defined as being essential if depletion consistently results in a deficiency syndrome and repletion specifically reverses the abnormalities.
D.
The trace elements fulfilling these requirements are As, Co, Cr, Cu, F, Fe, I, Mn, Mo, Ni, Se, Si, Sn, V and Zn.
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A.
血淀粉酶
B.
尿淀粉酶
C.
血尿淀粉酶
D.
肌酐清除率
E.
血钾、钠、氯
【多选题】建设工程质量事故的分类方法有许多，可以按（ ）来划分等。
A.
造成损失严重程度
B.
产生的原因和部位
C.
其造成的后果可变性
D.
其事故责任可变性
E.
工程地点
【单选题】In judging the progress he has made in his studies, we must take his long illness into ____.
A.
absence
B.
action
C.
attention
D.
account
【单选题】患者，男，48岁，5小时前大量饮酒，出现上腹剧烈持续疼痛1小时，弯腰时腹痛可减轻，体温36.6℃，疑为急性胰腺炎。治疗后期更有价值的指标是（）
A.
血AMY
B.
尿AMY
C.
肌酐清除率
D.
血AST
E.
血钾
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【简答题】The food we eat seems to have profound effects on our health. Although science has made enormous steps in food more fit to eat, it has, at the same time, made many foods unfit to eat. Some rese...
【简答题】韶山7E型电力机车用于控制（）电路接通或开断的接触器，采用6C型接触器。
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