BSP方法中，数据类分为四大类，下列中( )记录资源状况。
A．存档类
B．计划类
C．事务类
D．统计类
参考答案：A
Bears ______ fat stores throughout the summer and fall to have energy enough to last them through winter sleep.
A．build up
B．pack up
C．bring up
D．take up
分馏相当于多次蒸馏，正确与否？为什么？
