题目内容

弧面型宝石加工工艺对加工设备、技艺方法要求不高。

A. 对
B. 错

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坡屋顶是指屋面坡度在()以上的屋顶。

A. 5%
B. 10%
C. 15%
D. 20%

防水材料如尺寸较小,接缝必然就较多,容易产生缝隙渗漏,因而屋面应有较大的排水坡度,以便将屋面积水迅速排除。

A. 对
B. 错

Sustainable development is a matter of top ___ to the Chinese government.

A. conflict
B. concern
C. contact
D. conference

It indicates that China is seeing science as ___ to its future well-being.

A. efficient
B. unique
C. critical
D. alternative

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