全国农产品质量安全检测技能竞赛理论知识考试参考试题题库(2019年版)

1201960120195CABCD2AABCD3CABCD4CABCD5AABCD26DABCD7BA3B5C8D158BABCD92019813BABCD102019AABCD11CABCD12B3A1B2C3D413DABCD14BABCD15BABCD16BABCD17CA3B4C5D618BABCD19BAgBkgCmgD42015.456AA15.45615B15.45615.4615.516C15.45615.516D15.456-1621CA4B5C6D72225AmS/mA0.01B0.1C1D18.223AABCD24CABCD25CAB40CD26AABCD27AABCD285GB/T6682-2008BABCD29AA-16~-20B-10C-4D030CABCD31BABCD322.3mgCABCD33AACO2BCD34DABCD1+135CABCD3640g/LCA40g1LB40g960gC40g1LD40g960mL37BApH=7.0B[H+]=[OH-]CpOH=7.0DpH+pOH=14.038C6ABCD39BABCD40DABCD41CAFIDBFPDCECDDTCD42AABCD4340%BA20%-60%B30%-50%C25%-55%D35%-45%44AA12130minB12110minC10030minD1105min45BA100B30~300C100~500D30046AA10%B20%C30%D40%47DABC7D48DABCD49CA0B1/3C1/2D2/350CA6B8C10D2051AABCD52BA.B.C.D.53AABCD54AABCD55C8ABCD56BABCD57CABCD58BABCD59CABCD60BABCD401BCDEABCDE220195ABCDABCD39ACDABCD4ADABCD5ABCDABCD6ABCABCD7ABCDABCD8ABCDABCD9ADABCD10AB10ABCD11ABCDABCDE121ABCABCD13ACDBEABCDE14ABCDEFA.B.C.D.E.F.15ACDA.B.C.D.1116ABCDA.B.C.D.17BCDEABCDE18ABCDABCD19ABABCD20ABCABCD21ABCDABCD22ACDABCD23ABABCD24ABCABCPSAD25AB12ABC3D260.1mol/L0.1mol/L(pKa=3.74)ADABCD27ABCDABCD28ABCDABCD29BDABCD30ABCDABCD31ABCABCD32ACDABCD33ACABCD34ABCDABCD35ABCDAB13CD36BDABCD37ACABCD38ABCABCD39BCDABCD40ABCDABCD50120195202096%2201952020114345678910111213140.02mol/L1580+2080mL100mL1615171819202122232425262728SFE293031323303435363738391640414243444546.47.4849503511231745678251234531231845420198391515395123456812345196787123855123456782091:a5%b%%5%crr5%r2:a5%b%%5%cRR5%R10211211121216272433313S2215293S15451412534567892315,NY/T789-2004NY/T3304-201813kg231kg4100g16127.5-9cm17.GB/T30891-201413400g233400g42418NY/T3304-2018123191220123254521110min21802min3221223123264245123456782512341010~202h526GB/T6682-2008271GB/T6682-200820.01cm0.1cm2712342812342829123456730?29311/2/3//45632123413023453312345U678341234315673512345510.1mg/kg(r)0.040.5mg/kg(r)0.200.32mg/kg0.40mg/kgY=y1+(y2-y1)(x-x1)/(x2-x1)Y=0.04+(0.20-0.04)[(0.32+0.40)/2-0.1]/(0.5-0.1)=0.1440.4-0.32=0.080.080.144225.00g0.01g0.1mg/kg5mg/L=32=0.125.00/5=0.5mL0.5mL325.00mL0.09026mol/L24.91mL??=120.0902624.9110-325.0010-3=0.04497mol/L0.04497mol/L4A5.00g20mL10mL1.00mL1.0A700Hz20.00g/LA800HzAg/kg??=70020.001.0010-38005.0010-3=7.00g/kgA7.00g/kg5A0.365mg/kg0.010mg/kgB0.354mg/kg0.012mg/kgAB0156.0011.00156.0012.0010.0011.0354.0365.022222121222121=+=+=-=-+-UUyyUUyyAB103311210034211001221212334135%1h25%1h412133512913435abcd6124637201812523483612643920188612773103712963---------------------------------------------