Why does L4TM require T1 to be in promiscuous mode？（） 

A . To earn money for sch001． B . To keep his yard nice． C . To be able to work outdoors． D . To get exercise while working．

A . to ensure a loop-free topology B . to protect against user-side loops C . in order to support business applications D . because of the risk of lost connectivity without STP E . for the most deterministic and highly available network topology

A．They’ve been smoking like chimneys. B．I can’t stand smoking here. C．Many people around here are smoking. D．The secondhand smoke is going to kill us.

A．The professor think it is potential to make things which we love tree treasure if days gone. B．The professor think we can make things true treasure if days gone. C．The professor think we should buy expensive things. D．The professor like to buy antique.

A．To earn money for school. B．To keep his family's yard looking nice. C．To he able to work outdoors. D．To get exercise while working.

A．Because it was built as a lean tower. B．Because it was built on soft ground. C．We don't know.

A．To give an example of the instructional role of guilds. B．To correct a common misconception about guilds. C．To explain that guilds still exist in the modern world. D．To acknowledge that they share limited similarities with guilds.

A．Because she wants to play a camp with Mary. B．Because she wants to enjoy the sunshine with Mary. C．Because she wants to introduce a new drink to Mary. D．Because she wants to share her drink with Mary.

A．To warn about possible risks involved in phytoremediation B．To help illustrate the potential of phytoremediation C．To show that hyperaccumulating plants grow in many regions of the world D．To explain how zinc contamination can be reduced

A.Herealizesthereisagreatdividebetweenhislifeandthatofblue-collarworkers. B.Helooksdownuponthemechanicalworkattheassemblyline. C.Hehasnotdonemuchtohelphisco-workersatthefactory. D.Hehasstayedatschooljustforthepurposeofescapingfromtherealworld.

A．She does not know where to have the party. B．She does not know what to do at the party. C．She does not know when to attend the party.

A．To ask for advice B．To ask questions C．To make up for lessons D．To get his signature 此题为多项选择题。

A.To help his students learn English． B.To make his students work harder． C.To give his students some advice．

A.She’s come back from a Vacation． B.She’s rested for two days． C.She’s been exercising．

A、Need not disclose the referral fee but cannot trade on the non-public information. B、Must disclose the referral fee and cannot trade on the non-public information. C、Must disclose the referral fee but may trade on the non-public information.

A．To indicate to the professor that she is familiar with the drip technique B．To find out if she can see an original painting by Jackson Pollock in the university gallery． C．To make a comparison between her paintings and those of Jackson Pollock． D．To express interest in taking the professor’s class．