若函数在区间(0,+∞)内具有性质f(1x)=-f(x),我们称f(x)为“倒负

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问题:

若函数在区间(0,+∞)内具有性质f(
1
x
)=-f(x)
,我们称f(x)为“倒负”变换的函数,如f(x)=lgx就是一个“倒负”变换的函数,请写出一个“倒负”变换的非对数函数:______.
考点:函数解析式的求解及其常用方法
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灰铸铁的性能是强度低,塑性、韧性差,但是有良好的铸造性、切削加工性,较高的耐磨性、减震性及低的缺口敏感性。

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创办大生纱厂的清末状元实业家是 [ ]

A.张謇

B.荣德生

C.荣宗敬

D.范旭东

题型:填空题

禁用1:5000高锰酸钾溶液洗胃的毒物有()

A.内吸磷

B.毒蕈

C.有机毒物

D.生物碱

E.乐果

题型:填空题

another; like; area; those; health; there; angry; sound; look; art; more; way
Why do so many people around the world love Chinese cooking In China, cooking is an (66) , just like music, dance and painting. However, there is (67) than just one kind of Chinese food. Different areas in China have special (68) of cooking because of the differences in weather and geography.
Traditional Chinese doctors believe we need a balance of yin and yang to be (69) Maybe you should eat yang foods, (70) beef when you feel weak or tired. And you should eat yin foods like tofu while you are too stressed out or (71) The Chinese believe people who eat a balanced diet should be healthier than (72) who only eat foods that taste good.
(73) is much more to Chinese food than just taste. Behind many dishes are traditions with deep meaning. One Chinese food tradition is to eat long noodles on your birthday as a symbol of long life. (74) traditional food, yuan xiao, suggests that a family will always stay together. On the Spring Festival, people often eat fish, because yu (75) like the word meaning "more than enough".
From north to south, east to west, people are sure to find some kind of Chinese food to suit their taste and interest.

题型:填空题

局部通风机停止运转,停风区域中甲烷浓度达到()%时,系统应切断局部通风机的电源并闭锁。

A.1.0

B.2.0

C.3.0

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