When the methyl group and H atom are located on opposite sides of the double bond, the polymer is a cis－isomer.（)

A.select

B.from

C.where

D.grou by

A.5-[(3,4,5-trimethoxyphenyl)methyl]-2,6-pyrimidinediamine

B.5-[(3,4,5-trimethoxyphenyl)methyl]-4,6-pyrimidinediAmine

C.5-[(3,4,5-trimethoxyphenyl)methyl]-2,4-pyrimidinediAmine

D.5-[(3,4,5-trimethoxyphenyl)ethyl]-2,4-pyrimidinedi Amine

E.5-[(3,4,5-trimethyphenyl)methyl]-2,4-pyrimidinediAmine

A.All of these cargoes are mutually incompatible

B.Glycerine may be stowed adjacent to methyl acrylate but must be segregated from ethanolamine

C.Methyl acrylate and ethanolamine are compatible but both must be segregated from glycerine

D.Glycerine is compatible with both of the other cargoes

甲氧苄氨嘧啶的化学名为

A．5-[[3，4，5-trimethoxyphenyl]methyl]-2，6-pyrimidine diamine

B．5-[[3，4，5-trimethoxyphenyl]methyl]-4，6-pyrimidine diamine

C．5-[[3，4，5-trimethoxyphenyl]methyl]-2，4-pyrimidine diamine

D．5-[[3，4，5-trimethoxyphenyl]ethyl]-2，4-pyrimidine diamine

E．5-[3，4，5-trimethylphenyl]methyl]-2，4-pyrimidine diamine

（18 ）在 SQL SELECT 查询中，为了使查询结果排序应该使用短语

A ） ASC

B ） DESC

C ） GROU P BY

D ） ORDER BY

A.5-[[3 ,4,5-trimethoxyphenyl ]metbyl] 2 ,6-pyrimidine diamine

B.5-[[3 ,4 ,-trimethoxyphenyl ]methyl]-4 ,6-pyrimidine diamine

C.5-[[3 ,4 ,5-trimethoxyphenyl] methyl]-2 ,4-pyrimidine diamine

D.5-[[3 ,4 ,5-trimethoxypheny] ethyl]-2 ,4-pyrimidine diamine

E.5-[[3 ,4 ,5-trimethylphenyl] methyl ] -2 ,4-pyrimidine diamine

A.Methyl Paraben

B.Zinc Pyrithione

C.SLES

D.EDTA