Cov kws tshawb fawb Israeli pom quasicrystals thiab yeej 2011 Nobel nqi zog hauv chemistry ib leeg. Tag nrho cov paub quasicrystals yog intermetallic. Cov muaj pes tsawg leeg thiab cov qauv ntawm quasicrystals tseem tab tom kawm. Nws tau pom tias cov quasicrystals muaj li ntawm txhuas tooj liab hlau chromium muaj kev sib txhuam coefficient tsawg, siab hardness, tsis tshua muaj zog nto thiab tsis tshua muaj cua sov hloov, thiab tau raug tsim los ua coatings rau kib lauj kaub; Al65Cu23Fe12 yog hnav-tiv taus heev thiab tau tsim los ua txheej txheej ntawm kub arc nozzle. Cov lus hauv qab no yog qhov tseeb
A. Cov crystals tsim los ntawm ionic compounds yuav tsum muaj hlau ntsiab B. Cov sib txuas covalent yuav tsum tsis muaj cov tsis-polar bonds
C. Alloy yog ntshiab D. Quasicrystals tuaj yeem tsim los ua cov ntaub ntawv tshiab
Cov lus teb tus qauv yog D
Cov lus xaiv los ntawm 7th ntau yam lus nug ntawm daim ntawv xeem chemistry nruab nrab ntawm lub sijhawm thib peb (thawj) ntawm kev sib koom ua ke ntawm Jinlan Cooperative Organization hauv Ningbo, Zhejiang Province hauv 2012-2013 xyoo kawm ntawv
Reputation: tau kawg, cov hlau tuaj yeem ua dawb huv. Piv txwv li, tag nrho cov paub quasicrystals yog hlau intermetallic [4], uas tsuas yog qhia tau hais tias saum toj no-hais quasicrystal alloy Al65Cu23Fe12 yog ib tug ruaj hlau intermetallic compound (intermetallic forming compound) [5], uas yog, ntshiab. Qhov kev xav tsis zoo uas alloy yog ib qho sib tov yuav tsum tsis txhob siv los ua ib qho kev paub txog kev tshaj tawm lossis kev hu ua kev tawm dag zog. Piv txwv li, cov lus hais tias "alloys belongs rau cov mixs" nyob rau hauv cov kab lus hauv qab no muaj ib qho tseem ceeb scientific yuam kev thiab yuav tsum tsis txhob yuam kev:
Mastering cov ntsiab lus tseem ceeb ntawm High School Entrance Examination ntawm "Hlau thiab Cov Khoom Siv Hlau", muab los ntawm Lej, Physics thiab Chemistry rau Cov Tub Ntxhais Kawm Qib Nrab (Junior High School Edition, High School Entrance Examination Edition), Issue 10, 2013
