问题
问答题 简答题
在正常情况下，牛的每个发情周期是否有两个卵泡同时排卵？
答案
参考答案：
在正常情况下，牛的每个发情周期只有一个卵泡排卵，两个卵泡排卵的机率约占10%，三个卵泡同时排卵则很少见。
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在正常情况下，牛的每个发情周期是否有两个卵泡同时排卵？
参考答案：
在正常情况下，牛的每个发情周期只有一个卵泡排卵，两个卵泡排卵的机率约占10%，三个卵泡同时排卵则很少见。
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| Hank was 26 years old when he put on his first pair of long trousers and his first pair of shoes. For the first time he 1 himself as he had always wanted to be-a full five feet and eight inches tall. Hank was born with diseased 2 .Until he was seven,his world was a world of repeated 3 . At last he had no legs,but stumps that could be 4 with a kind of special boots. Out of hospital,Hank often found people staring at him with 5 interest.Children laughed at him and called him "Ape Man" because his arms 6 on the ground.He went to school like other boys.His 7 were good and he needed only eight years instead of the 8 twelve. After middle-school graduation,Hank 9 his way through college.He swept floors,waited 10 table,or worked in one of the college offices.During all this busy life,Hank had been moving around on his 11 .But one day th  e doctor told him even the stumps were not going to 12 much longer.Hank would 13 have to use a wheel chair. Hank felt himself go 14 all over.However the doctor said there was a 15 that he could be fitted with artificial legs. Finally a leg maker was found and the day came when Hank stood up before the 16 and saw himself for the f  irst time,five feet and eight inches tall.But this was not the end yet.He had to learn to his new legs.Again and again he marched the 17 of the room,and did back again.There were times when he fell down on the floor,but 18 himself up and went back to 19 marching. When World War came,he took the 20 training.Few knew that he was legless.This was the true story of Hank,the man without legs. | |||||
| ( )1.A.considered ( )2.A.arms ( )3.A.operations ( )4.A.operated ( )5.A.cruel ( )6.A.pushed ( )7.A.subjects ( )8.A.normal ( )9.A.worked ( )10.A.for ( )11.A.own ( )12.A.last ( )13.A.quickly ( )14.A.through ( )15.A.way ( )16.A.doctor ( )17.A.length ( )18.A.pushed ( )19.A.further ( )20.A.recovery | B.thought B.legs B.illness B.fitted B.kind B.dragged B.maths B.real B.found B.with B.stumps B.walk B.finally B.cold B.method B.window B.way B.rose B.endless B.regular | C.saw C.feet C.sadness C.marked C.strange C.pulled C.grades C.practical C.tried C.on C.feet C.remain C.later C.bad C.chance C.house C.area C.pulled C.far C.extraordinary | D.watched D.hands D.treatment D.armed D.funny D.hung D.books D.usual D.did D.at D.sticks D.support D.soon D.mad D.treatment D.mirror D.size D.threw D.new D.useful | ||