Pipes made of this plastic are now widely used in building as they are light and do not become ________ in water.

[单选题]（）are used widely in the operation of warehouse and distribution center andform the basic handling device for a number of selection system.A . CranesB . ConveyorsC . ForklifttruckD . Pallets

[单选题]G．ear pumps are widely used to transfer any one of the following but .A．fuel oilB．lube oilC．hydraulic oilD．fresh water

[单选题]The most widely used LAN system is ______ which adopts a form. of access known as CSMA-CD．A．EthemetB．ATMC．FDDID．Wireless

[单选题]（）, so they are widely used on board ship nowadays.A . Diesel engines have more advantages in comparison with gasoline enginesB . Diesel engines have more advantages in comparison to gasoline enginesC . Gasoline engines have more advantages in compar

[单选题] One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP). RIP is the canonical example of a routing protocol built on the （71）algorithm. Routing protocols in internetworks differ slightly from the ideali

[单选题]One of the most widely used routing protocols in IP networks is the Routing Information Protocol(RIP)．RIP is the canonical example of a routing protocol built on the (71) algorithm．Routing protocols in internetworks differ slightly from the idealized

[单选题]Most of the widely used global security indexes are:A.price-weighted.B.equa

[单选题]1． He used to _______in the sun，but now he is used to _______at night．A． read ; readB． reading ; readC． read; readingD． reading; reading

[单选题]22. He used to be _____, but now he likes to meet and talk to new people.A． busy B. strongC. tall D. shy

[单选题]Cement was [seldom]used in building during the Middle Ages.A.crudelyB.rarel