J'ai été éblouie___talent de Johnny, une vraie bête de scène. A.par leB.duC.auD.en 点击查看答案&解析 广告位招租 联系QQ:5245112(WX同号) 延伸阅读 你可能感兴趣的试题 1.单项选择题 Le concert aura lieu en plein air___il ne pleuve. A.bien qu’B.à moins qu’C.quandD.san...
The first one consists in the determination of DP n as a function of the mole ratio of telogen to monomer at the beginning of the reaction. The second one is based on the variation of the conversion degree of telogen to monomer. The last one requires the knowledge of the cumulated DP n...
«Notre école n’est utile qu’à la moitié des élèves». Le secrétaire national de la Ligue de lEnseignement, Eric Favey, ny a pas été par quatre chemins en animant le debat «Une autre école est-elle nécessaire» samedi matin à Grenoble. Durant une heure, Bernard Gerd...
Abstract Sterically hindered trimesitylgermylamine is a rare example of a stable primary germylamine. X-ray structural data show that germanium is shielded from nucleophilic attack by the surrounding mesityl groups. Nitrogen is still accessible, and the only reactions which occur are those in which ...
The role of chemical heterogeneity has been analysed through the experimental and calculated results. Finally, a good correlation has been obtained between measurements and calculation of the deformation during cooling of a 3D "croissant" shaped specimen.L Josephbibliogr...
(1956) Contribution a l'etude du systeme quinaire Ca++ - NH4+ - H+ - NO3- - PO4--- - H2O XVIII. Le systeme quaternaire Ca++ - H+ - NO3- - PO4--- - H2O. Helvetica Chimica Acta, Vol. XXXIX, No II, pp. 473-483, ISNN 1522-2675...
The synthesis of the four 5-tert-butyl-2,3,3-trimethylcyclohexanols is reported and the properties of these secondary alcohols are compared with those of the tertiary alcohols obtained earlier from the reduction of 5-tert-butyl-2,3,3-trimethylcyclohexene epoxides. It is confirmed that secondary...
(1956) Contribution a l'etude du systeme quinaire Ca++ - NH4+ - H+ - NO3- - PO4--- - H2O XVIII. Le systeme quaternaire Ca++ - H+ - NO3- - PO4--- - H2O. Helvetica Chimica Acta, Vol. XXXIX, No II, pp. 473-483, ISNN 1522-2675...
Instantaneous and cumulated polymerization degrees, ( DP n ) i and ( DP n ) cum were determined with the help of a theoretical study. These constants provide a rigorous control of the telomerization of vinyl chloride with RCCl 3 , (R containing an alcohol or ester group)....