Video: Koj xam qhov nruab nrab hauv PHP li cas?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Thaum twg koj xav tau lub nruab nrab , faib cov lej los ntawm kev suav (kev saib xyuas cov ntaub ntawv suav == 0, tau kawg). Thaum twg koj xav suav nrog tus lej tshiab, ntxiv tus lej tshiab rau cov lej thiab nce tus lej los ntawm 1.
Tom qab ntawd, tus qauv rau nruab nrab hauv Excel yog dab tsi?
Kev piav qhia. Rov qab cov nruab nrab (arithmetic mean) ntawm cov lus sib cav. Rau piv txwv , yog tias qhov ntau A1:A20 muaj cov lej, tus qauv = AVERAGE (A1:A20) xa rov qab nruab nrab ntawm cov lej.
Ib yam li ntawd, kuv yuav xam qhov nruab nrab li cas? Cov nruab nrab kuj yog tus naj npawb uas yog ib nrab ntawm lub teeb. Yuav nrhiav tau nruab nrab , cov ntaub ntawv yuav tsum tau teem nyob rau hauv kev txiav txim los ntawm tsawg mus rau loj tshaj. Yog hais tias muaj ib tug txawm tus naj npawb ntawm cov khoom nyob rau hauv cov ntaub ntawv teev, ces tus nruab nrab pom los ntawm kev noj qhov nruab nrab (nruab nrab) ntawm ob tus lej nruab nrab.
Ib yam li ntawd, tib neeg nug, koj ua li cas hauv PHP?
PHP | array_sum() Muaj nuj nqi Nws yuav siv sij hawm ib qho array parameter thiab xa rov qab sum ntawm tag nrho cov nqi hauv nws. Qhov tsuas yog sib cav rau qhov ua haujlwm yog qhov array uas nws sum yuav tsum tau xam. Qhov no muaj nuj nqi rov qab sum tau tom qab ntxiv tag nrho cov khoom ua ke. Cov rov qab los sum tej zaum yuav integer los yog ntab.
Dab tsi yog txhais los ntawm array hauv PHP?
Ib array yog cov qauv ntaub ntawv uas khaws ib lossis ntau yam zoo sib xws ntawm cov nqi hauv ib tus nqi. Piv txwv li yog tias koj xav khaws 100 tus lej ces tsis txhob txhais 100 qhov sib txawv nws yooj yim los txhais ib qho array ntawm 100 length. Associative array -Ib array nrog cov hlua ua index.
Pom zoo:
Yuav ua li cas koj xam qhov nruab nrab atomic mass ntawm strontium?
Yog li, peb xam nws los ntawm kev noj qhov hnyav ntawm txhua tus isotopes thiab ntxiv rau lawv ua ke. Yog li, rau thawj pawg, peb yuav muab 0.50% ntawm 84 (amu - atomic mass units) = 0.042 amu, thiab ntxiv rau 9.9% ntawm 86 amu = 8.51 amu, thiab lwm yam
Yuav ua li cas koj pom qhov nruab nrab thiab nruab nrab ntawm daim duab peb sab?
Txhawm rau nrhiav qhov chaw nruab nrab ntawm daim duab peb sab, nws yog qhov yooj yim tshaj plaws los kos tag nrho peb qhov nruab nrab thiab nrhiav lawv qhov kev sib tshuam. Txhawm rau kos qhov nruab nrab ntawm daim duab peb sab, ua ntej nrhiav qhov nruab nrab ntawm ib sab ntawm daim duab peb sab. Kos ib kab ntu uas txuas qhov taw tes no mus rau qhov rov qab vertex
Qhov nruab nrab nruab nrab ntawm lub ntiaj teb yog dab tsi?
Lub teb chaws qhov ntsuas kub yog 2.91 ° C (5.24 ° F) saum toj no 1961-1990 qhov nruab nrab, tawg cov ntaub ntawv yav dhau los tau teev tseg hauv 2013 los ntawm 0.99 ° C (1.78 ° F)
Koj pom qhov nruab nrab thiab nruab nrab hauv tableau li cas?
Kev sib txuas lus cov ntaub ntawv nrog Tableau los ntawm Ben Jones Qhov nruab nrab (lossis nruab nrab) yog txiav txim siab los ntawm kev suav tag nrho cov txiaj ntsig hauv cov ntaub ntawv teev thiab faib los ntawm tus lej ntawm qhov tseem ceeb. Qhov nruab nrab yog tus nqi nruab nrab hauv cov ntaub ntawv teev nyob rau hauv uas qhov tseem ceeb tau muab tso rau hauv kev txiav txim ntawm qhov loj
Koj ua li cas sib npaug redox cov tshuaj tiv thaiv hauv acidic thiab nruab nrab nruab nrab?
Acid Conditions Solution. Kauj Ruam 1: Sib cais ib nrab cov lus teb. Kauj Ruam 2: Ntsuas cov ntsiab lus uas tsis yog O thiab H. Kauj Ruam 3: Ntxiv H2O kom sib npaug ntawm cov pa. Kauj Ruam 4: Sib npaug hydrogen los ntawm kev ntxiv protons (H +). Kauj Ruam 5: Ntsuas tus nqi ntawm txhua qhov sib npaug nrog electrons. Kauj Ruam 6: Ntsuas cov tshuaj tiv thaiv kom cov electrons sib npaug