供电可靠性基础数据检查的原则是什么？

Those who _____ others are usually _____. [ ]

A. respected; respected

B. respect; respecting

C. respected; respect

D. respect; respected

等腰三角形周长是32厘米，一条腰长10厘米，底边上的高为8厘米，三角形面积是多少平方厘米？

闸门主梁、边梁与门叶面板的组合焊缝或角焊缝为一类焊缝。

某工厂6天烧煤4.2吨，12.6吨可以烧多少天？

He was walking along the sands ______ he saw a big footprint in the sand.

A．while

B．as

C．when

D．after