It has been proved that the sensitivity of analytes can be significantly enhanced by adding small amounts of oxalic acid,especially for the elements with ionization potential between 9 and 11 eV.

結(jié)果表明，低濃度乙二酸對(duì)所分析元素的靈敏度具有顯著的增敏效應(yīng)国产狼友，尤其是對(duì)電離電位在9～11eV的Be黄色网站在线免费观看www，Zn，Se国产精品香蕉AV，As欧美精品黄色免费线视频观看视频，Sb，Hg等高電離電位元素精品久久99国产精品。

While roughly a third of US oil comes from such unstable places as Nigeria and the Middle East, rare earth metals known scientifically as lanthanides, are controlled almost exclusively by China.

盡管美國(guó)將近三分之一的石油來(lái)自奈及利亞和中東這一類(lèi)不穩(wěn)定的區(qū)域性爱网欧美优物性爱，可是元素名稱為鑭系元素的稀土金屬，卻幾乎完全是被中國(guó)壟斷了久久久久久黃色網站。

The process is to find a set of elements i.e. interior cover in the lattice, which is closest to the least upper bound of the labeled elements, and which is such that all elements in the interior cover are "equilabeled".

數(shù)據(jù)縮減被看作如下過(guò)程：在格中尋找內(nèi)部覆蓋的一個(gè)集合欧洲熟妇色XXXX欧美在线观看，而所謂內(nèi)部覆蓋，在某種意義上最靠近已標(biāo)注元素的最小上界国产免费播放网站，并且所有元素在內(nèi)部覆蓋中是等標(biāo)注的亚洲顶级黄片毛片视频。

An element with greater stack order is always in front of another element with lower stack order.

有著較大的值的元素會(huì)堆疊在較小值元素的上面。

All the experiments affirmed that doping copper ions could help in improving absorbent properties and the Cu-doped manganate ion-sieves were applicable absorbent in lithium extraction in brine.

實(shí)驗(yàn)證明摻雜銅元素能夠有效提高錳酸鹽型鋰離子篩的交換性能免费A片大片aⅴ免费，摻雜銅元素的錳酸鹽型鋰離子篩是一種有希望能從鹽湖鹵水中提取鋰資源的吸附劑黄色一区哈啊肏。

Such a blend of musical elements was not entirely new: by 1924 both Milhaud and Gershwin had composed classical works that incorporated elements of jazz.

這種對(duì)音樂(lè)元素的混合不是完全的創(chuàng)新：在1924年 M 和 G 都創(chuàng)作了包含爵士元素的傳統(tǒng)音樂(lè)。

However, the formation of metal chelation at one or two side of biphenyl resulted a pair of enantiomers of monometallic or bimetallic complexes. Moreover, if the coordinating groups have chiral element (e.g., chiral oxazolines), the diastereomeric metal complexes will be formed.

而且国产精品三级黄色岛国AⅤ免费看，如果配位基團(tuán)上帶有手性元素精品国产三级AV在线黑，它們跟金屬配位后得到一對(duì)非對(duì)映異構(gòu)體成年人在线免费观看热视频，由于手性元素的影響，形成這一對(duì)非對(duì)映異構(gòu)體的能量是有差異的日韩欧美亚洲综合久久图片。

Results: After being calcined, the content of As in ochre decreased sharply, while the content of the other ten elements investigated all increased at different degrees.

結(jié)果：赭石炮制后As元素的含量大大降低免费无遮挡十八禁污污网站着，其它10種被測(cè)元素的含量均有不同程度的增加网站三级视频。

Because of this, the top and bottom margins of the contained children appear to protrude from the containing element.

因此亚洲一区二区色图，包含的子元素的頂部和底部空白邊就突出到容器元素的外邊。

Element Sc shows a obvious selectivity that it is enriched in pyroxene, and depleted in melilite and spinel.

這些元素的富集系數(shù)大多數(shù)小于1www.91九色、元素Sc顯示出在輝石中富集免费无遮挡无码永久真人视频观看，在黃〓石、尖晶石中貧化的明顯的選擇性精品激情视频。