天然气表压为0.35MPa,小时工况流量为120m/h,问小时标况流量是多少?
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“美国,只以一场会议和一纸协议就终结了英国对世界金融的控制权”。下列对此“协议”的表述,不正确的是()。
A. 其宗旨是降低关税,消除贸易壁垒
B. 维持了战后世界货币体系的正常运转
C. 加强了美国在国际金融领域的特权
D. 为世界经济的恢复和发展创造了条件
()能与溴―四氯化碳试剂反应,但不生成HBr气体。
A. 苯酚
B. 硝基苯
C. 乙烷
D. 乙烯
he network administrator is trying to add Switch1 to the network, but the 802.1Q trunk is not coming up. Switch1 was previously tested in the laboratory and its trunk configuration worked fine. What are three possible causes of this problem?()
A. The trunking configuration mode on Switch1 is set to Off.
B. The trunking configuration mode on the other end is set to On.
C. The trunking configuration mode on the other end is set to Desirable.
D. Cisco Discovery Protocol is not running on the other end.
E. There is a VTP domain name mismatch.
F. Switch1 does not support 802.1Q
防喘振控制器中安全裕度b1的增加和减小对防喘有什么作用?现在b1值为多少?