When the subjects wore shoes with different heel height and walked in different speed the ground reaction force and the track of the center of sole force were measured and analyzed quantitatively.

測(cè)量穿不同類型和不同鞋跟高度的受試者94人人操人人操人人看，在不同行走速度下地面反力的大小和鞋底壓力中心，分析地面反力變化和鞋底壓力中心軌跡。

The problems were designed not only to get them a working knowledge of the mechanics of combat but to teach the most basic thing an infantryman has to know: how to love the ground, how to use it to advantage, haw the terrain dictates tactics, above all how to live on it and in it for days at a time without impairment of physical efficiency.

所設(shè)計(jì)的問題不僅給他們一些戰(zhàn)斗機(jī)制運(yùn)作方面的知識(shí)，而且教會(huì)他們步兵必須了解的基本知識(shí)：如何判讀地形国产一级无码大片免费，如何利用有利地形，如何根據(jù)地形采取不同戰(zhàn)術(shù)永久女性毛片免费看，尤其是如何在地面生存黄色网站黄色网址视频，在不影響體能的情況下一次在地面生存好幾天。

The pipeline structure of control signal transmission system is complex, and its initial value and boundary condition are also complicated.

在總結(jié)并評(píng)價(jià)了地面與井下通信系統(tǒng)的信號(hào)傳輸方式基礎(chǔ)上2019人妻巨乳超碰，提出了地面信號(hào)下傳系統(tǒng)的設(shè)計(jì)原則和設(shè)計(jì)方案。

Several fierce flames are shot to Po. He dodged two then breaks a flowerpot. He makes accurate shot with pieces of broken flowerpot to the outlet of flames. Flaming mechnisms are operated with burning oil so they explodes one by one since the outlets have been obstructed. Later, Po seems to notice something and jumps upward all at once. As soon as he jumped, many steel spears shoot out vertically. A person with inferior martial art must be stabbed into a hedgehog shape. Po, though, shocks away all spears with a heavy both-handed slash which sends out intense collision energy and even makes a shallow pit on the ground. Po lands in the pit then runs to the wall.

只見幾道猛烈的火焰向童博射去亚洲欧洲综合无码一区二区，童博閃過兩道理论午夜，然后打碎一個(gè)花盆，把花盆碎片向火焰射口準(zhǔn)確的打過去国产精品青草视频免费播放，火焰機(jī)關(guān)是靠射出點(diǎn)燃的油国产操妓女的屄视频，出口一但被堵，就一個(gè)個(gè)自己炸毀了国产精品三级经典在线观看，之后童博不知察覺什麼突然向上躍起欧美老妇乱码伦视频，地面立刻向上垂直射出許多鋼矛，要是武功稍差之人欧美性爱去，一定被插成刺猬一樣一级黄色影片免费看，可是童博雙手持劍向下用力一劈，猛烈的劍氣不但震開所有鋼矛曰韩一区二区，還把地面打出個(gè)淺坑亚洲爱爱爱爱爱爱，童博落在淺坑中，一轉(zhuǎn)身向墻邊跑了過去

Mulching soil with straw could prevent soil water from vaporing anddecrease soil temperature.The growth of ginger were not different undermulching condition and shading condition,but the ginger growed poor in thenaked field.

生姜采取地面覆草栽培欧美小性交黄色，具有良好保水降溫作用日韩妓女精品影院视频播放，因而地面覆草條件下生姜的長(zhǎng)勢(shì)與傳統(tǒng)插草遮光栽培極為接近，但裸地生姜的長(zhǎng)勢(shì)則很差亚洲图片欧美激情。

Results(1)At concentration of 0.002 5%,the KT50 is 4 min :0.002 5% is 3.77(3.40-4.15)min ;0.005% is 3.17( 2.88- 3.48)min;0.01% is 3.45(3.25-3.65)min ;(2)the LC50 is 0.000 530 9%(0.000 490 0%-0.000 575 2%);(3)the 100% mortality(24 hour) with the Dagongda concentration is at the rate of 0.002 5%;(4)when used as residual smearing,Dagongda can be keep its efficacy more than 270 days under room temperature;(5)The field tests,the killing rates of 0.03% Dagongda to Xenopsylla cheopis were 80.80% for 2 days and 93.87% for 29 days respectively.

2當(dāng)藥物濃度在0.0025%欧美日产国产变态精品、0.005%、0.01%時(shí)老妇女老少妇老熟女乱熟，印鼠客蚤24h死亡率均為100%日本人人操人人aa。(3)持效：藥膜在室溫和普通濕度下存放9個(gè)月后，藥物濃度在0.0025%以上時(shí)无码一级做a爱过程免费不卡片，印鼠客蚤24h死亡率均為100%五月天人人干人人干。(4)現(xiàn)場(chǎng)2d滅效：使用0.03%濃度對(duì)地面游離印鼠客蚤的校正滅蚤率為80.80%无码老熟妇色视频。(5)現(xiàn)場(chǎng)殘效(29d)：使用0.03%濃度對(duì)地面游離印鼠客蚤的校正滅蚤率為93.87%。

It will decrease when the pointing angle increases,and vice versa.By giving a pixel size of 20 μm for a detector,an orbit altitude of 600 km and a beam deflexion angle low than 30° for the imaging spectrometer, the effective focal length of the telescope was calculated(400,470 or 435 mm),and the relation curves between the relative ratios of ground resolution and the beam deflexions were presented.

給定成像光譜儀探測(cè)器像元尺寸為20 μm欧美精品日韩极品在线视频播放网站，飛行軌道高度為600 km国产无码视频网站，光線擺角≤30°，以星下點(diǎn)黄色wangzhan、最大擺角和整個(gè)運(yùn)動(dòng)補(bǔ)償段地面分辨率中值為30 m為依據(jù)來(lái)計(jì)算望遠(yuǎn)系統(tǒng)的焦距亚洲国产一级av，求得望遠(yuǎn)系統(tǒng)焦距為400、470特黄特色免费全部视频、435 mm欧洲AV无码乱码一级毛片，并給出了此時(shí)的地面分辨率相對(duì)比值與光線擺角的關(guān)系曲線。

The windswept grass and heather there clung closely to the downsloping ground, which stretched away from the stones to sink at last out of the firelight at the hill's northern edge.

狂風(fēng)中的青草国产黄色在线视频网站，和石南花国产一区二区精品系列在线观看，貼近下斜坡的地面，這地面bbixx.con，從這些石頭旁免费午夜性爱视频，向外延伸，最后免费在线免费A片，在遠(yuǎn)離火光的地方国产精品亚洲欧美在线一区，下沉到了山的北峰。

Experiments is located at Yucheng Comprehensive Experimental Station, Chinese Academy of Sciences, Yuchen County, Shandong Province (Latitude: 36°57′N, Longitude: 116°36′E, and Altitude: 20m) in 2000～2001 and 2001～2002 winter wheat growing seasons. Mainly observed factors under sprinkler irrigation and surface irrigation conditions include (1) dry and wet bulb temperature and wind speed at four heights, radiation, soil temperature and water surface evaporation of 20cm standard pan on the top of canopy;(2) winter wheat tillering, stem height, leaf area, biomass and yield; and (3) soil water content and winter wheat evapotranspiration.

實(shí)驗(yàn)在中國(guó)科學(xué)院禹城綜合試驗(yàn)站進(jìn)行欧洲性爱综合，主要觀測(cè)內(nèi)容包括：（1）噴灌和地面灌溉條件下近地面不同高度處的溫度和濕度狼友在线精品视频网站、輻射、地溫和冠層頂部水面蒸發(fā)量等農(nóng)田小氣候要素欧美肏逼mp4；（2）葉面積久久精品嫩草影院免费看、生物量和產(chǎn)量等作物生長(zhǎng)要素；（3）土壤水分變化過程欧美乱爽乱视二、農(nóng)田蒸發(fā)過程和冬小麥耗水量等要素欧美一级一级精品久久。

Terrestrial digital multimedia/television broadcasting system is presented by Tsinghua University. Reed-Solomon code is one of the most powerful and widely used coding schemes for FEC.

在這樣的背景下，清華大學(xué)吸取了國(guó)內(nèi)外在地面數(shù)字電視廣播上的研究成果欧美性A一区二区，提出了富有創(chuàng)新性的一種地面數(shù)字電視傳輸標(biāo)準(zhǔn)：DMB-T傳輸系統(tǒng)先锋网站资源。