问题:
A、OxygenCarbon Dioxide.B、PlantsTheir Roots.C、How Photosynthesis Wks.D、Why Our Earth Needs Water.
问题:
A、Carbon dioxide. B、Water vap.C、Oxygen. D、Food.
问题:
A、explaining a process.B、telling a sty.C、comparingcontrasting.D、convincing the reader of plants’ imptance.
问题:
A、photosynthesis.B、the fmation of glucose.C、global warming.D、water getting to the roots of plants.
问题:
A、heavy.B、extra.C、green.D、liquid.
问题:
A、Scientists used wrong guidelines of mathematicsB、Scientists used wrong building materialsC、Scientists used different operating systemsD、Scientists u...
问题:
A、possible life on MarsB、the size of MarsC、the shape of MarsD、the atmosphere of Mars
问题:
A、they didn‘t know the English system.B、they were sure of the success of the trip.C、they didn‘t get enough research funding.D、they were tired from wor...
问题:
A、Right after it left for Mars.B、When it got near Mars.C、Right after it landed on Mars.D、When it returned to Earth.
问题:
A、One year.B、Less than one year.C、About two and a half year.D、More than three years.
问题:
A、tree B、division C、root D、leaf
问题:
A、treeB、divisionC、rootD、leaf
问题:
A、these B、them C、this D、that
问题:
A、calculates B、reaches C、gathers D、reduces
问题:
A、stops B、finds C、controls D、selects