-What’s that？ -_____ is a cat（）

A . prevent the passage of flammable gases B . prevent the passage of poisonous vapors C . delay the spread of heat and flames D . maintain watertight integrity

A . 正确 B . 错误

A . A、那是客厅，这是卧室 B . B、那是电话表，这是价目表 C . C、这是壁厨，那是卫生间 D . D、这是节目单，那是电话表

A . Customer satisfaction analysis and final payment B . Administrative closeout and archiving records C . Finial contractor payment and Lessons learned D . Product verification and administrative closeout

A . flashes at regular intervals at a frequency of 120 flashes or more per minute B . is yellow in color C . is visible over an arc of the horizon of not less than 180°nor more than 225° D . All of the above

A . has a declination equal to twice that of the Sun B . comprises two stars that appear close together C . is twice as bright as a single star D . suddenly becomes much brighter and then fade

A . has left hand twist B . has inside threads on both ends C . has outside threads on both ends D . takes two men to operate

A . generally shorter than the others and is used to steer with B . is longer than the others and is used as the stroke oar C . is raised in the bow of the boat for the steersman to steer by D . longer than the others used for steering

A . The Thread.sleep() method can take t1 as an argument. B . The Object.notify() method can take t1 as an argument. C . The Thread.yield() method can take t1 as an argument. D . The Thread.setPriority() method can take t1 as an argument. E . The Object.notify() method arbitrarily chooses which thread to notify.

A . exhibits a change in magnitude B . has a changing declination C . is increasing in SHA D . is also known as a red giant

A . the entire network switches to 802.1D and generates BPDUs to determine root bridfe status. B . A migration delay of three seconds occurs when the port that is connected to the 802.1D bridge comes up C . The entire network reconverges and a unique root briddge for the 802.1D segment， and a root bridge for the 802.1W segment， is chosen D . the first hop 802.1w switch that is connected to the 802.1D runs entirely in 802.1DCompatibility mode and converts the BPDUs to either 802.1D or 802.1W segments of the network E . Classic 802.1D timers， Such as forward Delay and Max-age， will only be used as a backup， and will not be necessary if point-to-point links and edge prots are properly identified and set by the administrator.

A . charted record of atmospheric temperature over time B . charted record of atmospheric pressure over time C . graphic record of combustible gases measured in an atmosphere D . graphic record of vapor pressure from a flammable/combustible liquid

A . runs from a low supporting level up to the cargo at an angle B . is also known as a distance piece C . is placed on the deck under the cargo to distribute its weight evenly D . is run horizontally from a support to the cargo

A . produces pressure B . imparts energy to a fluid to move it from level ‘A’ to level ‘B’ C . creates a vacuum to move a liquid in all installation D . is to develop a pressure differential

A.A program is made up of multiple projects B.A program requires at least three times longer to plan than a project C.A project is a one-shot deal while a program is on-going D.A and C E.B and C

A．enables you to go to sleep. B．enables you to sleep deeply. C．enables you to get up early. D．wakes you up during your last light sleep phase

A) beautiful B)primary C) attractive D)valuable

A、Security prices would react only to the “unexpected” elements of information. B、Investors would prefer active investment strategies to passive investment strategies. C、The time frame for price adjustment allows many traders to earn profits with little risk.