韵母发音最响亮的是哪儿？
参考答案：
韵腹。
We should have _____ sense of responsibility to do something to help _____ poor whenever they are in
_____ trouble. [ ]
A. a; 不填; the
B. a; the ;不填
C. 不填; the; the
D. a; the; the
计算冷拉钢筋的屈服强度和抗拉强度时，采用冷拉前的（）。
