冠心病或肺心病伴哮喘发作易选用()
A.异丙肾上腺素
B.麻黄碱
C.氨茶碱
D.色甘酸钠
E.地塞米松
参考答案:C
Being good host takes more than helpful volunteers and building nice stadiums. Wellbehaved fans are face of China, too.
A.the; the
B.a; a
C.the; a
D.a; the
按照分色原理,C(青)、M(品红)、Y(黄)三色就能复制图像,为甚么印刷还要用K(黑版)。()
A.补偿三色印刷的不足,使暗调厚实、层次分明
B.补偿套印不足,减少漏白出现
C.提高印刷适性,降低成本
D.提高清晰度