[多选]
Based on the show spanning-tree vlan 200 output shown in the exhibit，
which two statements about the STP process for VLAN 200 are true？（）

A . BPDUs will be sent out every two seconds.
B . The time spent in the listening state will be 30 seconds.
C . The time spent in the learning state will be 15 seconds.
D . The maximum length of time that the BPDU information will be saved is 30 seconds.
E . This switch is the root bridge for VLAN 200.
F . BPDUs will be sent out every 10 seconds.

集线器的基本功能是信息分发，把从一个端口接收的信号向所有端口分发出去。根据网络的地理位置进行分类，网络可以分为（）。局域网。城域网。广域网。互联网。亚太经合组织的英文缩写是（）。 APEC。 WTO。 PECC。 OECD。建筑物轴线竖向投测前，应检测基准点，确保其位置正确，每层投测的允许偏差应在（）以内，并逐层纠偏。 1mm。 2mm。 3mm。 4mm。管状皮带有一组有（）个托辊。 3。 5。 6。

Based on the show spanning-tree vlan 200 output shown in the exhibit，
which two statements about the STP process for VLAN 200 are true？（）

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[多选] Based on the show spanning-tree vlan 200 output shown in the exhibit， which two statements about the STP process for VLAN 200 are true？ （）

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[多选]
Based on the show spanning-tree vlan 200 output shown in the exhibit，
which two statements about the STP process for VLAN 200 are true？（）