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Results: The 12 kinds of toxicants including methyl acetate, ethyl acetate, benzene, toluene, ethylbenzene, butyl acetate, p-dimethylbenzene, m-dimethylbenzene, o-dimethylbenzene, n-butanol, cinnamene and cyclohexanone were separated well. Good linear relationship sensitivity and reproducibility were obtained and detection limits (S/N=3) of them were 0.2 mg/l respectively. Conclusion: In this paper, a new method for simultaneous determination of 12 kinds of toxicants by using gas chromatography has been described.

结果：对乙酸甲酯、乙酸乙酯、苯、甲苯、乙酸丁酯、乙苯、对二甲苯、间二甲苯、邻二甲苯、正丁醇、苯乙烯、环己酮12种有毒物质的分离效果好，线性和重现性均较好，方法的检测限达到0.2 mg/L。

Is a research and development, production, trade and service-based economy of foreign trade entities, chemical raw materials to the professional operation of the main company's existing production of AC blowing agent, ferric chloride, hydrated Hydrazine, p-nitrophenol, m-phenylenediamine, phosphorus trichloride, phosphorus oxychloride, 2,4 - diamino benzene sulfonate, sodium dichloro isocyanurate, N-methyl-o-phenylenediamine Second hydrochloride fine chemical products such as the ability, and are obtained ISO9001 international quality system certification.

济南华尔沃进出口贸易有限公司是一家集研发、生产、贸易、服务于一体的外贸型经济实体，以专业经营化工原料为主，公司现有生产AC发泡剂、三氯化铁、水合肼、对硝基苯酚、间苯二胺、三氯化磷、三氯氧磷、2，4—二氨基苯磺酸钠、二氯异氰脲酸钠、N-甲基邻苯二胺二盐酸盐等精细化工产品的能力，并且均以取得ISO9001国际质量体系认证。

Jambos that nearly no change appeared in its CRR. Similarly, the LWR and LAR in M.candidum and S. jambos decreased while both parameters revealed an increase trend in other species under air pollution. In general, the results from this study demonstrated that P.

在污染区生长的植株叶质量比和叶面积比与清洁区相比存在差异，野牡丹和蒲桃叶质量比和叶面积比下降，而其余3种植物叶质量比和叶面积比上升。

Btw dun call me kuku coz tat's ur nick. I'm yaya k =P

还真是谢谢你顺便来找我吃饭wor。

The typi ca1 symptom j s fold and b1 istering, even d istortj on, 1ops i ded j -- eaf, shorti ng p ant, there are motley with 1ight green and deep green, and some of the motey are ye1wt MM 1eave M tny: the i.1--1ed has arias mosai c, 1ops i ded, and the tissue of the i11--1eaf has deteriorated exceeding1y, with s1ender pteridophyte 1.eaves, i l1 p1ant is green--yeI 1ow, obvious1y shortened in joint, the who1e p1ant serious1y shortened and grows thickly.

南瓜病毒病的典型症状为皱缩有疱斑、甚至扭曲，病叶畸形，植株矮化；花叶叶片上出现淡绿色和深绿色相间的斑驳，有的斑驳明显黄化；蕨叶丛枝型：病叶不但严重花叶、畸形，而且叶肉组织极度退化，纤细呈蕨叫叶状，病株黄绿色，节间明显缩短，整个植株严重矮化丛枝状。

The 35th NWCS Graduation Ceremony and New Year's Party will be held on 1/17/04 at 1:30 p.m. in the Somers High School Auditorium.

北威中文学校第三十五届毕业典礼暨新年晚会将於一月十七日下午 1：30 在 Somers 高中的礼堂举行。

Bis (P—bromobenzylamino) ethane and 1,2—bis (m—Iodobenzylamino) ethane may be prepared by condensation of the corresponding halo benzaldehyde with ethylenediamine and followed by catalytic hydrogenation of the Schiff's bases over Pto_2 in glacial acetic acid solutions: Both Ⅱa and Ⅱb may react in neutral mediam with aldehydes to form well—defined crystalline tetrahydro—imidazole, which may be served as derivatives of identification for aldehydes: Under the same condition, however,Ⅱb may ...

用1，2-二乙烷与二十余种醛类作用，得到有固定熔点的晶体衍生物，它们的熔点分布在85—210℃之间，产率为40—96％，这试剂与甲基酮类在相同条件下无反应，因此，它可作为鉴定醛类的专属试剂。 2。上述衍生物用稀盐酸在室溫处理，能发生水解，可以定量地收回原来的醛，因此这试剂又可作为分离醛类的试剂。 3。上述衍生物可以用非水滴定法半微量地测定其分子量可作为鉴定醛类的另一项参考数据。 4.1，2-二乙烷与醛类能生成晶体衍生物，但这试剂也与甲基酮在同样条件下发生反应，所以不适合作为鉴定醛类的专属试剂。

Ma y b e Go d w ants us to m ee t a f ew wro n g p e ople b ef o re meeti ng the right one, so that when we finall y meet t he per s on, w e wi ll kn ow ho w to be gra tef u l .

在遇到梦中人之前，上天也许会安排我们先遇到别的人；在我们终于遇见心仪的人时，便应当心存感激。

But Israel's West Bank commander, Maj. Gen. Yair Naveh, announced shortly after 7 p.m. that the wanted men and several other militants in the jail had surrendered.

但是，以色列西岸地区指挥官亚·纳维准将宣称，刚过7：00 pm他们要抓的人和其他几名狱中的好战分子就已经投降了。

Considering the final score, it's hard to imagine the game was tied when Gerald Laird (3-for-5 tripled to rightfield to lead off the fifth, a drive Bobby Abreu didn't play well near the wall. He was still at third with one out when Brad Wilkerson hit a grounder to Rodriguez, who threw to Posada for what should have been an easy out. www.wangfans.com#}; 6 ~2 p \- J% i; m% q

这个最后的比数，让人很难相信当Gerald Laird〔五支三〕在五局率先上场打出三垒安打时，比赛还是以1比1平手，当时Abreu没有处理好这个打到墙边的飞球，在一出局之后，Gerald Laird还是留在三垒，而当Brad Wilkerson 打出三垒滚地球被A-ROD接到传给Posada时，这应该是个必死的出局数。2 H0 }0 f， b* L

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。