The length of the accessional tube, which was aroused by the volume of loudspeaker, decreases with the increasing of resonant tube.

由揚(yáng)聲器端體積引起的附加管長也隨著諧振管的增加而逐漸減小欧美亚洲国产一区二区三区VA。

Only in the millisecond range, the current efficiency decreases with shortening pulse period due to the disproportionation of cuprous ions and the dissolution of copper adatom.

在毫秒范圍時會因?yàn)閬嗐~離子的不對稱反應(yīng)以及銅吸附原子的溶解而使得電流效率隨著縮短脈沖周期而下降。

T he contact angle of the films with SiO 2 ratio of 6%～13% decreases to 2° duri ng a 30 min UV irradiation,and keeps lower than 6° for 5 days without UV irr adiation.

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The alkoxyl group at 2-position is affected by the steric repulsion due to the two methyl groups at 1, 3-position, which causes the oxygen atom of alkoxyl group to deviate from the aromatic ring plane, hence, the conjugation effect of the oxygen atom with aromatic ring decreases

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The study shows that weed density in paddy fields significantly decreases with more than 94% grass-controlling effect under SF compared with CK. Before rice booting stage, weeds compose mainly of Alopecurus pratensis, Echinochhloa crausgalli, Cynodon dactylon, Alternanthera philoxeroides, Mouochoria vaginalis, Murdannia triquetra and Eclipta prostrata in SF. During heading to ripe stage, weeds are mainly A. philoxeroides, E. crausgalli, C.

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The results show that the hydrophilicity of PLA film is improved by introduction amido: the contact angle decreases from 78° to 56° and the free energy increases from 42.7mJ/m^2 to 51.4mJ/m^2. Compared with the control, osteoblast spread out more filopodia after 3 d incubation on amidation surface, and it entered cell division phase more quickly, which indicated that the surface amidation could promote the cell's adhesion and proliferation on the PLA film.

結(jié)果表明欧美午夜艳，酰胺基的引入改善了PLA膜的表面親水性，其表面水接觸角由78°減少到56°国产午夜福利在线播放92，自由能由42.7mJ/平方公尺增大到51.4mJ/平方公尺亚洲三级片视频；與對照組相比caoporen永久免费公开视频，成骨細(xì)胞在改性表面培養(yǎng)3d后有大量的絲狀偽足伸出，并且較快地進(jìn)入了細(xì)胞分裂期国产人澡人澡澡澡人碰视频，表明PLA膜表面的酰胺化能夠促進(jìn)細(xì)胞的黏附和增殖xxxxx欧美性爱。

In this case, study on the quality analysis of the douchi product. The α-ammoniacal nitrogen content increases five times, the total carbohydrate enhances one point three times and protein decreases about twenty seven percent.

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The results show that static order of Ag atoms increases,and anharmonic vibration of Ag atoms becomes stronger when Ag particle size decreases.

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From the calculations, it can draw the conclusions:① The interaction potentials induced by the interaction of phonons with the ele ctron can be divided into two parts. One is only relevant to the coordinate z 1(z2), and the other is relevant not only to z1 and z2 but als o to ρ.② The absolute values of the induced potentials VIL and VI,σ decrease with the increase of ρ.③ The abs ol ute value of IO-phonon-induced potential decreases with the increase of the qu antum well width.

通過計算可得出如下結(jié)論：(1)雙極化子的誘生勢可以分為兩部分，其中一部分僅與一個電子的坐標(biāo)z1(z 2)有關(guān)性多多视频，另一部分則不僅與兩個電子的坐標(biāo)z1和z2都有關(guān)黄片A片aa视频,一级无码，還與兩個電子間的相對距離ρ有關(guān)；(2)誘生勢VIL和VI欧美wwwxx，σ的絕對值隨著雙極化子中兩個電子間相對距離ρ的增加而減?090精品无码久久久。?3)由于電子與IO聲子相互作用而產(chǎn)生的誘生勢VI一级国产欧美日产，σ的絕對值隨量子阱寬度N的增加而減小亚洲欧美另类69XXXXX动漫。

It not only arains natural resources day by day and decreases the biological diversity,but also seriously prevents the Loess platean's area econnomy from developing continuingly,then threatens the local people's living and development,thus,the study and governing of biological degeneration should be regarded seriously.

中文摘要：摘要：生態(tài)退化是目前黃土高原所面臨的主要環(huán)境問題，它不僅使自然資源日益枯竭欧美男女性爱视频中文免费、生物多樣性不斷減少18未成禁片一级毛片喷水，而且還嚴(yán)重阻礙黃土高原地區(qū)經(jīng)濟(jì)的持續(xù)發(fā)展，進(jìn)而威脅當(dāng)?shù)厝嗣竦纳婧桶l(fā)展欧美午夜性，因此免费视频在线观看4444，對生態(tài)退化的研究和治理應(yīng)給予萬分的重視。