问题
多项选择题
室内热水供应管道，其长度超过40m时，应设置的补偿器有（）。
A．L形补偿器
B．方形补偿器
C．套管伸缩器
D．Z形补偿器
答案
参考答案：B, C
解析：
该题主要考查对水管道受热伸长的理解。对伸长量应采取补偿措施，否则会导致管道弯曲破裂。室内热水供应管道，其长度超过40m时，应设置的补偿器主要有方形补偿器和套管伸缩器。
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室内热水供应管道，其长度超过40m时，应设置的补偿器有（）。
A．L形补偿器
B．方形补偿器
C．套管伸缩器
D．Z形补偿器
参考答案：B, C
解析：
该题主要考查对水管道受热伸长的理解。对伸长量应采取补偿措施，否则会导致管道弯曲破裂。室内热水供应管道，其长度超过40m时，应设置的补偿器主要有方形补偿器和套管伸缩器。
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| Wild animals are important to us. They 1 together with us on the earth. If there are no 2 on the earth, we 3 will not live on. So we should take good care of them. But some people 4 don't know the importance of protecting them. They kill wild animals for 5 and other things. Every day many wild animals are killed. So lots of them have died out. We can't see 6 any more. Today wild animals are becoming fewer and 7 . If people don't protect them, they will die out. If this 8 , there will be no animals left on the earth. 9 , many children have begun to know the importance of protecting wild animals. They ask 10 to stop killing them. They also teach others about the importance of protecting them. Now many countries 11 some laws to protect them 12 stop people from killing them. Protecting wild animals is the 13 of each of us. We should do our best 14 them, because protecting them is protecting 15 . | ||||
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