Dicotyledonous cog qia qauv

Lus piav qhia luv luv:

• Daim Ntawv Thov: Tsim nyog rau txhua tus neeg xav paub txog lub cev, kev saib xyuas neeg mob, physiology. Nkag siab txog ntau yam kabmob ntawm tib neeg lub cev thiab lawv txoj haujlwm txheeb ze. Zoo heev rau cov menyuam kawm ntawv, khoom plig zoo meej rau menyuam yaus.
• Cov kab mob Epidermal yog cov ntses thiab keratinized, thiab cortical hlwb yog tuab-horned ze rau epidermis thiab phab ntsa-puab. Vascular bundles qhia phloem fibers, thawj phloem, tsim thiab thawj phloem, tsim thiab thawj xylem. Yog ib qho kev pab qhia biology tsawg tsawg
• Tus qauv yog coj los ntawm dicotyledonous tshuaj ntsuab qia sunflower. Tus qauv yog txiav longitudinally thiab transversely, thiab nws transverse seem yog hais txog 2/3 ntawm lub qia.Ib sab ntawm lub longitudinal seem hla lub medullary rays thiab ib sab dhau los ntawm vascular pob. Tso cai rau koj los ua ke txoj kev xav zoo nrog kev xyaum los txhawb kev nkag siab
• Cov qauv no yog ua los ntawm polyvinyl chloride (PVC) yas, uas yog corrosion-resistant, hnav, thiab muaj zog heev.Zoo rau tsev kawm ntawv cov cuab yeej qhia, kev kawm zaub, thiab cov khoom sib sau ua ke, kuj yuav yog ib qho zoo ntxiv rau koj cov khoom siv kuaj.