一般情况下无预冷空气时，再生吸附器所需的氮耗为（）m3/h。
A．120
B．110
C．100
D．90
参考答案：B
“日初出苍苍凉凉，及其日中如探汤，此不为近者热而远者凉乎？”中的“为”是指[ ]
A．为了 B．因为 C．是
The company in Suzhou produced quantities of first-class silk, most of them ____ to Europe.
A．selling
B．sold
C．were sold
D．are selling
