灌注水下混凝土如导管漏水有可能发生()事故。
A.导管断裂
B.堵管
C.灌注速度太快
D.埋管
参考答案:B
–your daughter must be pretty.
--- But to tell you the truth, she is ____being such a beauty as you can imagine.
A.far from
B.as well as
C.as a result of
D.by means of
低碳经济的实现途径有().
A.技术创新
B.能源结构清洁化
C.提高能效
D.观念创新