2010-2024历年重庆市重庆一中高二上学期期中考试英语试卷（带解析） .docx

2010-2024历年重庆市重庆一中高二上学期期中考试英语试卷（带解析）

第1卷

一.参考题库(共25题)

1.Doyouknowmulch?Mulchisaprotectivecoverofmaterialthatisspreadontopofsoil.Itisusuallymadeoutoforganicmaterial,likecropwaste.Farmersmaykeeptheremainsofcornorothercropsontopofthesoil.Thiscreatesmulchonthesoilsurface.Theplantremainshelpprotectthesoilagainstwindandwaterdamage.Mulchingisoneofthebestthingspeoplecandofortheirplants.Italsohelpskeepthesoilfromgettingdry,andreducestheneedforwateringplants.Italsolimitstemperaturechangesinthesoil.Anditstopsunwantedplants,orweeds,fromgrowing.

Organicmulchimprovestheconditionofsoil.Asthemulchbreaksdown,itprovidesmaterialwhichkeepsthesoilfromgettinghard.Thisimprovesthegrowthofrootsandincreasesthemovementofwaterthroughthesoil.Italsoimprovestheabilityofthesoiltoholdwater.Organicmulchcontainsnutrientsforplants.Italsoprovidesgoodenvironmentforearthwormsandotherhelpfullivingthingsinthesoil.

Itiseasytofindorganicmulchmaterials.Cut-upleavesandsmallpiecesoftreebarkcanbeused.Grasscuttingsarealsoagoodmulchforplants.Mulchfromnews-papersworkswellincontrollingweeds.

Thebesttimetoaddmulchdependsonyourgoal.Mulchprovidesathickbarrierbetweenthesoilandtheair.Thishelpstoreducetemperaturechangesinthesoil.Asaresult,mulchedsoilwillbecoolerthanothersoilinthesummer.Inwinter,themulchedsoilmaynotfreezeasdeeplyasothersoil.Thebesttimeisafterthegroundhasfrozen,butbeforethecoldestweatherarrives.Spreadingmulchbeforethegroundhasfrozenmayattractsmallanimalssearchingforawarmplacetospendthewinter.Delayingthespreadingshouldpreventthisproblem.Theanimalswillprobablyfindanotherplacetolive.

【小题1】TheauthortellsusthefollowingEXCEPT______.

A．whatmulchisanditsadvantages

B．thebesttimetoaddmu