【单选题】声级计的计权网络中,B计权网络是根据()方等响曲线设计的
【单选题】T h e downward trend has itself ________ and in some districts has begun to rise.
【判断题】声级计有A,B,C三挡计权网络。A计权网络由于其特性曲线接近于人耳的听觉特性,因此是世界上噪声测量中最广泛的一种计权网络。
【单选题】常见的计权网络近似地模拟了40方、70 方、100方三条等响曲线,称为A、B、C计权。C计权声级是模拟人耳对 ()噪声的响度感受。
【单选题】What has a hand but can't scratch itself?
【单选题】在所有计权网络中,对低频噪声成分削减最多的是:
【单选题】---- An ant has two stomachs --- one for itself and the other for others. ----Really? Quite interesting. I ________ anything about it.
【判断题】Programs can't be built into the hardware itself.
【单选题】What has the Academy asserted to defend itself against such criticism?
A.
It has taken into consideration the opinions and suggestions from various parts of the world.
B.
Its physical distance from the world's literary capitals serves to protect itself from outside influence.
C.
No politics, whether international or regional, has ever interfered with its process of selection.
D.
Its only standard of selection is true writing ability.