When using simultaneous voice and multicast on a single WLAN and RF band, what is the recommended DTIM value of the WLAN for VoWLAN devices?（）
第1题：
In securing a towing cable，consideration must be given to letting go in an emergency．The possible whip of towlines when released can be overcome by ______．
A.increasing the shaft RPM prior to release
B.using a pelican hook for quick release
C.using preventers
D.using a short chain for the lead through the stern chock
第2题：
When using slings，cargo handlers should take all the following precautions except ______．
A.Ensure that slings are securely fastened around the load
B.Avoid careless winch operations，especially when handling fragile cargo
C.Exercise care when using hooks，crowbars，and similar tools
D.Keep the loads as close to the rail or deck as possible
第3题：
A.When using versions of Java technology earlier than 5.0.
B.When sharing a StringBuffer among multiple threads.
C.When using the java.io class StringBufferInputStream.
D.When you plan to reuse the StringBuffer to build more than one string.
第4题：
When you are designing a Web application， which options define how rich text displays in a browser？（）
第5题：
When NIC teaming is used, how are Loops avoided in a virtual switch?（）
第6题：
Which statement concerning the lashings of containers with solid bar or wire rope lashings is TRUE ________．
A.Stack weights should be less when using a solid bar lashing as compared to a wire lashing
B.Stack heights may be increased when using a solid bar lashing
C.Stack heights should be reduced when using a solid bar lashing
D.Solid bars should be used for lashing the first tier only，with wire lashings on the higher tier（s）
第7题：
When should traffic shaping be implemented on Frame Relay PVCs？（）
第8题：
A. To simplify the process of creating new users using the CREATE USER xxx IDENTIFIED by yyy statement.
B. To grant a group of related privileges to a user.
C. When the number of people using the database is very high.
D. To simplify the process of granting and revoking privileges.
E. To simplify profile maintenance for a user who is constantly traveling.
第9题：
What two situations could require the use of multiple routing protocols? （）
第10题：
Whichtwo scenarios are NOT safe to replace a StringBuffer object with a StringBuilder object？（）