温度计是实验室常用的工具，它是根据液体的____ 原理制成的．根据如图所示测量液体温度的操作情况，

提出使用温度计时注意事项中①____ ；②____ ．

    On Sundays we often go to the1near our school. There are many2 in it—tigers, elephants, pandas and monkeys. The3 are very big. They all have4 noses. Their noses can5 them eat and drink. Tigers are very6. They often run around. They don't like to7 in the zoo. Many people like8. They are animals of China. But I like monkeys most. We like9 to the zoo. We can10 more about animals there.

在我国社会主义市场经济中,企业间的竞争越来越激烈,企业的兼并和破产现象也越来越多。企业间的兼并和企业破产（  ）

①是价值规律作用的结果　②是股份制改造的最佳途径　③是市场失灵的具体表现　④是优化资源配置的客观要求