Specimens were examined by histological method to determine the cycle of the gonad development of this nemertean. The results showed that: The sex ratio (female: male) was about 1: 1. The sizes of mature males and females were not significantly different; females are rosy in colour and males are white, largely owing to the metamerically arranged gonads. Gonads, which were not detected in samples of autumn months, arose in December, but sexes were indistinguishable until middle January.

結(jié)果表明：扁額原細(xì)首紐蟲雌雄比例約為1：1人人插插AV；雌雄體長6080电影网站午夜伦、體重?zé)o顯著差異；性成熟雌體通常體壁呈玫瑰紅色激情中文小说区图片区，雄體呈白色2020手机黄色网址，非繁殖季節(jié)雌雄體色無明顯差異；一年有兩次性腺發(fā)育欧美性爱久精品，第一次12月開始出現(xiàn)性腺人人干,人人操。，1月可辨雌雄，3月15日達(dá)到第一次性腺發(fā)育高峰一级A一级a毛片爱片免费看免免，4月15日性腺消失91部精品国产费观；第二次于4～5月開始出現(xiàn)性腺，6月15～30日達(dá)到高峰一级又黄又粗毛片视频，9～10月性腺消失aaaaaa性欧洲。

A class of nonlocal reaction diffusion systems with the Neumann boundary condition that arose f rom the theory of ignition is studied.

研究了一類來源于燃燒理論的半線性非局部反應(yīng)擴(kuò)散方程組。

It arose over slavery in the new territories.

它出現(xiàn)在新界奴役久久伊人精品免费视频。

From this extraordinary journey arose an unlikely love between one scientist and a beautiful Peruvian noblewoman.

從這個不平凡的歷程之間產(chǎn)生一個科學(xué)家和一個美麗的秘魯裁制不可能的愛国产天天在线视频。

In Manchukuo there was an ongoing campaign to defeat the volunteer armies that arose from the popular frustration at the policy of nonresistance to the Japanese. In 1933, the Japanese attacked the Great Wall region, and in its wake the Tanggu Truce was signed, which gave Japan the control of Rehe province and a demilitarized zone between the Great Wall and Beiping-Tianjin region.

這個時候，似乎是為了表達(dá)對中國政府奉行的一直遭受挫敗的不抵抗日本軍隊的政策的不滿视频黄片。永久。，在被日本人占領(lǐng)的中國滿洲地區(qū)出現(xiàn)了許多抵抗日軍占領(lǐng)和和反對偽滿洲國統(tǒng)治的抗日義勇軍人人插女人，雖然說此后這些義勇軍一直遭到日本人和偽滿洲國軍隊的攻擊。1933年日本軍隊對長城地區(qū)進(jìn)行攻擊免费无码成年片在线观看，隨后中國政府又被迫簽署塘沽停戰(zhàn)協(xié)定91视频网免费观看，該協(xié)定的簽署又讓日軍控制了中國的熱河省并迫使中國承認(rèn)北平和長城之間的地區(qū)即天津地區(qū)成為非軍事區(qū)。

The question arose partly because of the number of nuclei found in each cell.

找不到答案的部分原因在于每個細(xì)胞內(nèi)發(fā)現(xiàn)的核酸數(shù)量在线国产毛片。

The first is the connection between the changing electric field and the magnetic field. It arose from Oersted's experiment on the deflection of a magnetic needle and led to the conclusion: a changing electric field is accompanied by a magnetic field.

第一個是變化著的電場跟磁場相結(jié)合看偷拍视频的网站，它是從奧斯特的關(guān)于磁針發(fā)生偏轉(zhuǎn)的實驗中形成的，并且它得出了這樣的結(jié)論：變化著的電場總是由磁場伴隨著的九九视频免费精品视频。

Atum-Re arose from the Nun, and appointed the Ogdoad to their proper places in the Heavens.

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OBJECTIVE:In 1971, Olney and his associates discovered that excited amino acids , such as Glutamic acid, could arose cell death of centrum neural system, and for the first time they imported excitotoxin.

目的：1971年日韩黄色视频a片免费看，Olney等發(fā)現(xiàn)谷氨酸（Glutamic acid，Glu）等興奮性氨基酸能引起中樞神經(jīng)系統(tǒng)的細(xì)胞死亡黄色网站成人在线观看涩爱，并引入了興奮毒這一概念操人妻免费视频。

To counter the problem of film break arose often from the TDO of the production of BOPP, a new method was put forward to judge and monitor the suitability of the on-line working condition of TDO by observing and comparing the data from the measurement of the film thickness gauge system.

針對BOPP生產(chǎn)中橫向拉伸工段常發(fā)生的破膜問題日韩毛片视频大全色网站，提出一種通過觀察和對比BOPP測厚系統(tǒng)測量數(shù)據(jù)來判斷并監(jiān)控BOPP生產(chǎn)線TDO的實時工況是否合適的方法。