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【单选题】
下面不是低温保存食品原理的是:
A.
降低微生物生长繁殖和代谢活动。
B.
降低酶的活性和食物内化学反应的速度。
C.
杀灭所有微生物。
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参考答案：
举一反三
【单选题】A System of Guaranteed Subsistence Minimum A hundred years ago it was assumed and scientifically 'proved' by economists that the laws of society made it necessary to have a vast army of poor and joble...
A.
the slow development of the economy
B.
the fault of the poor and the jobless themselves
C.
the lack of responsibility on the part of society
D.
the large number of uneducated people
查看完整题目与答案
【单选题】The author of this passage correlates the fisherman's use of the net to______.
A.
a scientific method
B.
a conceptual notion
C.
a controlled experiment
D.
a replicable event
查看完整题目与答案
【多选题】水利测功机的优点是
A.
结构相对简单
B.
体积较小
C.
制造成本低
D.
动态响应特性好
查看完整题目与答案
【简答题】SECTION B ENGLISH TO CHINESE Directions: Translate the following text into Chinese. Scientific methodology is based on generating hypotheses and testing them to see if they make sense; in laboratories...
查看完整题目与答案
【判断题】如果在充电时发现车里散发出一种不同寻常的气味或者烟，请立即停止充电。
A.
正确
B.
错误
查看完整题目与答案
【单选题】According to the passage, _____is the key factor to making 'Nowcasts' a reality.
A.
scientific and technological advances such as radar, or satellites
B.
computer scientist
C.
meteorologists
D.
advanced computer programs
查看完整题目与答案
【简答题】给出定义：若函数f(x)在D上可导，即f′(x)存在，且导函数f′(x)在D上也可导，则称f(x)在D上存在二阶导函数，记f″(x)＝(f′(x))′，若f″(x)<0在D上恒成立，则称f(x)在D上为凸函数．以下四个函数在(0， )上不是凸函数的是________． ①f(x)＝sim x＋cos x     ②f(x)＝ln x－2x ③f(x)＝x 3 ＋2x－1       ④f(x)＝x...
查看完整题目与答案
【单选题】Which of the following is not mentioned as a necessary part to maintain America's scientific leadership?
A.
Money.
B.
Combination of various disciplines.
C.
Joint efforts of the most intelligent scientists.
D.
Favorable academic atmosphere.
查看完整题目与答案
【多选题】保险市场的特征有( )。
A.
直接的风险市场
B.
非即时清结
C.
保险公司为市场的主导者
D.
特殊的“期货”交易市场
查看完整题目与答案
【判断题】电气控制电路接线的校核和测绘是电气安装和维修工程一项重要内容。实际工程中，借助PLC的状态监控功能来校核或测绘PLC的I/O接线，是非常实用的方法，其中软元件测试的强制输出功能特别适用于单点负载的测试，例如PLC输出负载为电磁阀线圈、继电-接触器线圈、指示灯等。对于输入点的测试和校核，也可以用手动方法使接近开关动作或复位，根据PLC输入点指示灯亮灭状态来确定接近开关的输入点分配，但这种观察方法比较...
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】A System of Guaranteed Subsistence Minimum A hundred years ago it was assumed and scientifically 'proved' by economists that the laws of society made it necessary to have a vast army of poor and joble...
A.
the slow development of the economy
B.
the fault of the poor and the jobless themselves
C.
the lack of responsibility on the part of society
D.
the large number of uneducated people
查看完整题目与答案
【单选题】The author of this passage correlates the fisherman's use of the net to______.
A.
a scientific method
B.
a conceptual notion
C.
a controlled experiment
D.
a replicable event
查看完整题目与答案
【多选题】水利测功机的优点是
A.
结构相对简单
B.
体积较小
C.
制造成本低
D.
动态响应特性好
查看完整题目与答案
【简答题】SECTION B ENGLISH TO CHINESE Directions: Translate the following text into Chinese. Scientific methodology is based on generating hypotheses and testing them to see if they make sense; in laboratories...
查看完整题目与答案
【判断题】如果在充电时发现车里散发出一种不同寻常的气味或者烟，请立即停止充电。
A.
正确
B.
错误
查看完整题目与答案
【单选题】According to the passage, _____is the key factor to making 'Nowcasts' a reality.
A.
scientific and technological advances such as radar, or satellites
B.
computer scientist
C.
meteorologists
D.
advanced computer programs
查看完整题目与答案
【简答题】给出定义：若函数f(x)在D上可导，即f′(x)存在，且导函数f′(x)在D上也可导，则称f(x)在D上存在二阶导函数，记f″(x)＝(f′(x))′，若f″(x)<0在D上恒成立，则称f(x)在D上为凸函数．以下四个函数在(0， )上不是凸函数的是________． ①f(x)＝sim x＋cos x     ②f(x)＝ln x－2x ③f(x)＝x 3 ＋2x－1       ④f(x)＝x...
查看完整题目与答案
【单选题】Which of the following is not mentioned as a necessary part to maintain America's scientific leadership?
A.
Money.
B.
Combination of various disciplines.
C.
Joint efforts of the most intelligent scientists.
D.
Favorable academic atmosphere.
查看完整题目与答案
【多选题】保险市场的特征有( )。
A.
直接的风险市场
B.
非即时清结
C.
保险公司为市场的主导者
D.
特殊的“期货”交易市场
查看完整题目与答案
【判断题】电气控制电路接线的校核和测绘是电气安装和维修工程一项重要内容。实际工程中，借助PLC的状态监控功能来校核或测绘PLC的I/O接线，是非常实用的方法，其中软元件测试的强制输出功能特别适用于单点负载的测试，例如PLC输出负载为电磁阀线圈、继电-接触器线圈、指示灯等。对于输入点的测试和校核，也可以用手动方法使接近开关动作或复位，根据PLC输入点指示灯亮灭状态来确定接近开关的输入点分配，但这种观察方法比较...
A.
正确
B.
错误
查看完整题目与答案
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