磨音低沉发闷是因为：（）
A、磨机转速快
B、磨机转速太慢
C、入磨粒度太大
D、喂料太多
参考答案：D
The scientists and engineers are judged ________ how great their achievements are.[ ]
A. in spite of
B. in terms of
C. in favour of
D. in ways of
影响硬膜外麻醉平面的因素有哪些？
