Alllivingorganisms,regardlessoftheiruniqueidentity,havecertainbiological,chemical,andphysicalcharacteristicsincommon.
A、asaresultofDespitetheproliferationofotherfastermodesoftransportation,therailroadsremainthelargestcarriersofintercityfreightintheUnitedStates.
People who do not sleep enough tend to become irritable .
Someanimalspantandsweattospeedevaporationofbodymoistureandthuscoolthemselves.
Peoplewhodonotsleepenoughtendtobecomeirritable.
Food must be moist in order to have a taste.
