分子筛粉化后，虽然吸附容量下降，但经过（）后还能继续使用。
参考答案：筛除粉末
Which of the following is not one of the responsibilities of the Tariff Commission
A．To formulate the guideline for drawing up the regulations.
B．To set temporary tariff rates.
C．To levy Customs tariffs on imports & exports.
D．To examine the draft of the amendment to tarif
