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電大植物病理學(xué)考試試題及答案小抄(文件)

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【正文】 株上,表現(xiàn)出相同癥狀的病害。His exciting day trip was filmed by Panda Paws Rescue, a Washington statebased charity that cares for Duncan and other dogs with special Panda Paws Rescue 拍攝,該組織專門照料 Duncan 以及其他有特殊需求的狗。t like to use YouTube 上,他們說有一把供 Duncan 使用的輪椅,但是他并不愛用。視頻中有些特意制作的慢鏡頭,但是沒有任何一處做過加速處理,你們可以通過視頻感受到 Duncan 跑得有多快。s owners have described him as a 39。He39。It would be the best if he had four legs, of course, but his body wasn39。 ” I39。m grateful for my parents39。m fortunate to have been given many opportunities throughout my career and now I feel it39。m starting a new adventure and I39。m fortunate to have realised those this day, one of my proudest achievements is captaining my country. I knew every time I wore the Three Lions shirt, I was not only following in a long line of great players, I was also representing every fan that cared passionately about their country. I am honoured to represent England both on and off the wouldn39。s OK. He and we have just adapted.39。主人們用 “騎兵 ”一詞來形容 Duncan,他們在組織的 Facebook 中寫道: “他很快樂,也很健康;而且在他自己看來,他是條正常的狗。, adding on charity39。 The thrill of running through the surf was clear to see, as Duncan raced people and dogs across the sand, with his tail wagging excitedly. Duncan踏著浪花,在沙灘上同其他人及狗賽跑,還興奮地搖著尾巴,他的喜悅之情顯而易見。We let him be free and just walk on his two legs. There is some slow motion in this video, but none of the video has been sped up, this gives you an idea of how fast Duncan really it,39。 He was born with deformed back legs, which were later removed to make the dog more fortable. Duncan 出生時,它的后肢就是畸形的,此后為了讓他舒服些 ,只能進行截肢。 B; C; A; B; D; C; C; C; C; D; 1 A; 1 A; 1 C; 1 B; 1 A D; C; B; C; D; D; D; A; C; A; 1 C; 1 B; 1 C; 1 B; 1 D B; D; D; B; C; D; A; B; D; C; 1 A; 1 B; 1 B; 1 A; 1 D ; ; ; ; ; ; ; ; ; ; ; ; ; A boxer that only has front legs refuses to let his disability hold him back as he charges across a beach with his fourlegged pals.一條只有兩條前肢的拳師犬不愿讓殘疾成為前進 的障礙,他同其他四條腿的伙伴們一同在海灘上盡情狂奔。 ( 1)在病植物上檢查到病原物。 ( 1)利用抗病品種 利:經(jīng)濟有效、防病徹底 弊:對垂直抗病品種而言,抗性易喪失;抗性基因往往與 不良農(nóng)藝性狀連鎖;源短缺。 ( 6)品種的抗病性不同,發(fā)病輕重有很大差異。( 2)植株幼嫩情況:葡萄葉片,果實、蔓處在幼嫩階段,有利于病害的發(fā)生。 ( 4)生物防治是利用有益微生物對病原物各種不利作用來減少病原物的數(shù)量和削弱其致病性。 試述植物病害不同防治措施的作用機理。 (2)病害的癥狀有差異,霜霉病的病征為紫灰色至白色霉層;白粉病的病征為白粉層。 革蘭氏染色 反應(yīng)的原理:細菌細胞壁中肽聚糖厚時,染色不易洗去。共 24 分) 防治瓜類枯萎病應(yīng)取哪些措施? ( 1)選育利用抗病品種;( 2)深耕、曬土、輪作、淹水、田園衛(wèi)生; ( 3)嫁接防??;( 4)藥劑防治;( 5)生物防治;( 6)利用誘導(dǎo)抗性。 A、分生孢子 B、游動孢子 C、孢囊孢子 D、節(jié)孢子 植物幼苗猝倒病的主要病狀是 A、立枯 B、畸形 C、萎蔫 D、猝倒 CMV 的形狀是 A、桿狀 B、線狀 C、 X 狀 D、球狀 TMV 主要是通過 傳染的。 A、 B、 7km C、 10km D、 1十字花科蔬菜菌核病菌在田間氣溫適宜,相對濕度在 以上時利于發(fā)病。 A、球狀 B、螺旋狀 C、桿狀 D、念球狀 1植物的花葉病都是由 引起的。 A、茶樹煙煤病 B、桔柑黑霉病 C、柑柑樹脂病 D、柑桔膏藥病 炭
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