蒸氨罐投用前使（）调节阀带电。
A.流量
B.低压蒸汽压力
C.气氨液位
D.气氨快关阀
参考答案：B, C, D
测量噪声时，测点数要根据机床大小而定，一般以每隔（）定一点进行测量，以终点所测得噪声的最大值作为机床的噪声。
A.0.5m
B.1m
C.1.5m
D.2m
Palmer insisted there was a basic difference between the ______ capacities of human beings and the trained or " studial" capacities of the classroom learner.
