A lightweight access point has been connected to a Catalyst 3550 24-PWR switch， and on power-up the access point fails. What is the problem with the switch？（）
A. The power supply has inadequate wattage.
B. Power is incorrectly configured on the port.
C. It does not support 802.3af Poe.
D. Power is not enabled on the port.
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MSR30-16的接口是（）。
A. 1FE+2SIC+1MIM
B. 1FE+4SIC+1MIM
C. 2FE+2SIC+1MIM
D. 2FE+4SIC+1MIM
If a diesel engine starts firing, but is unable to come up normal speed, either without load or even under a small load, the cause may be （）
A. insufficient fuel supply
B. faulty governor
C. high exhaust back pressure
D. all of the above may cause this problem
汽车用电容器工作时要承担初级线圈产生的300v左右的自感电动势，为此它应具有耐交流电压（）的绝缘强度。
A. 300V
B. 500V
C. 600V
D. 800V
如今，旅游已成为生活丰富多彩的现代人的时尚。做一名文明游客，游览景区时在“吃”的方面须注意的文明礼仪有哪些？
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