(1÷5):(1÷8),
=15:18,
=8:5.
故选:B.
It is said that the iron and steel works _____not far from here, but now there ______no means of finding it out.
A.is ; is
B.are ; are
C.are ; is
D.is ; are
关于心绞痛发作时的处理方法,不妥的是
A.立即就地休息B.立即舌下含服硝酸甘油片C.疼痛不缓解可以每10分钟重复服用硝酸甘油一次D.最多含服3次硝酸甘油E.连续含服硝酸甘油后胸痛不缓解,应立即要救护车送医院救治