Happiness and life style go together. Some people constantly complain about petty things. ...

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【单选题】

Happiness and life style go together. Some people constantly complain about petty things. They hunger after luxuries which they cannot afford. They become frustrated and sick. Whereas some others take things easy and keep themselves happy, cool and poised. In other words, happiness can be experienced by cultivating healthy thinking.

Happy are those who take life easy.

It is always advisable to make a habit experiencing happiness naturally.

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参考答案：

举一反三

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肠激酶(肠致活酶)

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核酸酶

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糜蛋白酶

弹性蛋白酶

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HCO 3 -

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【单选题】激活胰蛋白酶原的最重要的物质是

盐酸

肠致活酶

钠离子

糜蛋白酶

组织液

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【判断题】对固定资产进行编码管理,目的在对固定资产进行分类管理,提高管理效率。()

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