防爆电气设备入井前，应经过哪些检查全格并签发合格证后，方可入井？
参考答案：
应检查其“产品合格证”、“煤矿矿用产品安全标志”、“防爆合格证”及安全性能。
下列词语中加点的字，每对的读音完全相同的一组是
A．信札／包扎哺育／追捕挫折／厝火积薪
B．会计／市侩奶酪／旱涝惬意／锲而不舍
C．嗜好／谥号氛围／分量噱头／空穴来风
D．庇护／奴婢伶俜／娉婷嗔怒／瞠目而视
_____ the calculation is right, scientists can never be sure that they have included all variables and modeled them accurately.
A．Even if
B．As far as
C．If only
D．So long as
