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【单选题】
选出下列句子不是被动句的一项( )
A.
,汤被之矣。
B.
恐为。
C.
君子寡欲则不役于物。
D.
赢闻如姬父为人所杀。
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举一反三
【多选题】灭菌的方法有哪些?
A.
火焰灭菌和干热灭菌
B.
湿热灭菌
C.
过滤除菌
D.
紫外线灭菌与化学试剂消毒杀菌
【单选题】The status of nitrogen balance in pregnant women is as follows:
A.
intake of nitrogen = exhaust of nitrogen
B.
nitrogen intake > nitrogen output
C.
nitrogen intake < exhaust of nitrogen
D.
nitrogen intake ≤ nitrogen loss
E.
none of the above is true
【单选题】制定劳动定额的方法有很多用潮时、观察、实验等手段,测定每劳动过程的标准时间及其平均完成的工作量,据以制定定额的一种方法是()
A.
技术制定法
B.
经验告计法
C.
统计分析法
D.
比较类推法
【简答题】灭菌的方法有哪些?
【单选题】制定劳动定额的方法有很多,用测时、观察、实验等手段,测 动 过 程 的 标 准 时 间及其平均完成的工作量,据以制定定额的一种方法是()。
A.
. 技术测定法
B.
. 经验估计法
C.
. 统计分析法
D.
. 比较类推法
【多选题】市场失灵为什么不可避免,其主要原因是( )。
A.
资源的产权清晰
B.
完全竞争
C.
公共产品数量不多
D.
短期行为不存在
E.
长期竞争不存在
【单选题】有岩石圈及上地幔物质的机械运动使刚性岩块突然断裂而引起的地震是()
A.
陷落地震
B.
诱发地震
C.
火山地震
D.
构造地震
【判断题】染色时染料与纤维的结合力是化学结合,不可能有物理结合( )
A.
正确
B.
错误
【判断题】vi编辑器可以同时编辑多个文件()
A.
正确
B.
错误
【多选题】What is nitrogen cycle?
A.
In the biosphere, the metabolic processes of different species function interdependently to salvage and reuse biologically available nitrogen in a vast nitrogen cycle.
B.
The first step in the cycle is fixation (reduction) of atmospheric nitrogen by nitrogen-fixing bacteria to yield ammonia (NH 3 or NH 4 + ). Although ammonia can be used by most living organisms, soil bacteria that derive their energy by oxidizing ammonia to nitrite (NO 2 ˉ ) and ultimately nitrate ( NO 3 ˉ) are so abundant and active that nearly all ammonia reaching the soil is oxidized to nitrate. This process is known as nitrification.
C.
Plants and many bacteria can take up and readily reduce nitrate and nitrite to ammonia through the action of nitrate and nitrite reductases. This ammonia is incorporated into amino acids by plants. Animals then use plants as a source of amino acids to build their proteins. When organisms die, microbial degradation of their proteins returns ammonia to the soil, where nitrifying bacteria again convert it to nitrite and nitrate.
D.
A balance is maintained between fixed nitrogen and atmospheric nitrogen by bacteria that reduce nitrate and nitrite to N 2 under anaerobic conditions, a process called denitrification. These soil bacteria use NO 3 ˉ or NO 2 ˉ rather than O 2 as the ultimate electron acceptor in a series of reactions that (like oxidative phosphorylation) generates a transmembrane proton gradient, which is used to synthesize ATP.
相关题目:
【多选题】What is nitrogen cycle?
A.
In the biosphere, the metabolic processes of different species function interdependently to salvage and reuse biologically available nitrogen in a vast nitrogen cycle.
B.
The first step in the cycle is fixation (reduction) of atmospheric nitrogen by nitrogen-fixing bacteria to yield ammonia (NH 3 or NH 4 + ). Although ammonia can be used by most living organisms, soil bacteria that derive their energy by oxidizing ammonia to nitrite (NO 2 ˉ ) and ultimately nitrate ( NO 3 ˉ) are so abundant and active that nearly all ammonia reaching the soil is oxidized to nitrate. This process is known as nitrification.
C.
Plants and many bacteria can take up and readily reduce nitrate and nitrite to ammonia through the action of nitrate and nitrite reductases. This ammonia is incorporated into amino acids by plants. Animals then use plants as a source of amino acids to build their proteins. When organisms die, microbial degradation of their proteins returns ammonia to the soil, where nitrifying bacteria again convert it to nitrite and nitrate.
D.
A balance is maintained between fixed nitrogen and atmospheric nitrogen by bacteria that reduce nitrate and nitrite to N 2 under anaerobic conditions, a process called denitrification. These soil bacteria use NO 3 ˉ or NO 2 ˉ rather than O 2 as the ultimate electron acceptor in a series of reactions that (like oxidative phosphorylation) generates a transmembrane proton gradient, which is used to synthesize ATP.
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