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煤的发热量的定义是什么？

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蒸压灰砂砖具有诸优势，但力学性能较差。

A. 正确
B. 错误

A system at 192.100.45.17 is able to print to the printer. However, another system at 192.100.50.23 cannot print to the same printer. All of the following should be performed EXCEPT:（）

A. Increase the size of /var.
B. Check /etc/qconfig file.
Check the default route.
D. Check for name resolution.

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