多项选择题

热压灭菌的灭菌条件是 A.
在密闭高压灭菌器内进行 B.
在干燥、高压条件下进行 C.
在表压98.07kPa压力下，温度为121.5℃，灭菌20分钟 D.
采用饱和水蒸气 E.
采用过热水蒸气

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A.长度
B.质量
C.时间
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单项选择题

Complete the following sentences with appropriate words in the box. Change their forms if necessary.

retain
biodiverse
sustainable
renewable
affordable
calamity
ubiquitous
insulation
More often than not, however, such considerations and planning in construction projects may fall through (失败) as desirable materials are generally not ____________.