在燃烧室本体方面,可采取()的办法或者采用(),使燃烧工况得以改善。
参考答案:气流分流;火焰稳定器
先天性视 * * 异常,说法错误的是()
A.先天性视 * * 小凹的视野变化与小凹大小成正比
B.牵牛花综合征与胚裂上端闭合不全、中胚层发育异常有关
C.视 * * 缺损常伴脉络膜缺损
D.先天性视 * * 小凹为神经外胚叶发育缺陷
E.牵牛花综合征患者眼底动静脉不易区分
—What is the result of the survey?
—15% of those surveyed worry that in the long term children _________ be more dependent
on their parents, which does no good to them.
A.should
B.can
C.may
D.shall