燃气轮机中冷却技术的最主要对象和关键是：（）
A.气缸
B.转子
C.透平动叶
D.轴承
参考答案：C
These photos will show you .
A．what does our village look like
B．how does our village look like
C．what our village looks like
D．how our village looks like
预防中风最首要的任务是（）
A.治疗高脂血症
B.降低血液黏度
C.限制食盐摄入
D.防治高血压
E.防治糖尿病
