夹轨钳制动带磨损，各铰接部分有卡住现象或润滑不良，会使制动力矩增大。
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Context-Based Access Control (CBAC) is the algorithm of the Cisco IOS firewall feature. How does CBAC improve Teleworker security?（）
A. Inbound packets are permitted only if they are part of a legitimate data flow initiated by a device on the Teleworker home network.
B. All packets are checked for integrity by analyzing their checksum.
C. Every packet is checked to see if it was sent through the VPN tunnel.
D. Every packet is inspected to see if any disallowed URLs are included. URLs are forwarded to the security cache engine for authorization.
TBV是用来防止哪个部件喘振（）
A. 高压压气机
B. 低压压气机
C. 高压涡轮
D. 低压涡轮
汽车制动踏板，用力踩时（）
A. 制动效果小
B. 制动效果大
C. 制动效果不变
D. 制动效果无大小
VBV是用来防止哪个部件喘振（）
A. 高压压气机
B. 低压压气机
C. 高压涡轮
D. 低压涡轮
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