40只2月龄的本地黄兔，每只体重1kg左右，第5天死亡4只，第6天死_爱下问搜题

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问题单项选择题 A1型题

40只2月龄的本地黄兔，每只体重1kg左右，第5天死亡4只，第6天死亡10只，第7天送了5只濒死幼兔到某兽医站化验室解剖检查。据畜主介绍，病兔均在很短时间内忽然发病死亡，死亡前几小时采食、饮水、行动还很正常，有的未见任何前期征兆而突然死亡，曾用土霉素、磺胺类药物、恩诺沙星等进行防治，均未见明显效果。病兔精神委顿、食欲减退，皮毛粗乱，眼鼻分泌物增多，体温升高，贫血，下痢，肛门周围粪便沾污，腹围膨大，肝区触诊有疼痛反应，黏膜黄疸。死前出现神经症状，四肢呈游泳状划动，头向后仰，尖叫，极度消瘦，最后衰竭而死亡下列哪种方法更有助于对球虫病的快速确诊（）

A.饲养场取陈旧粪样检查

B.饲养场取新鲜粪样检查

C.现有的粪样重复检查

D.现有的粪样置于温箱内孵化1周后再检查

E.重新剖杀取粪样检查

答案

参考答案：B

阅读理解

阅读理解。

This is Jim's room. It's a nice room. There are some pictures on the wall. There is a desk and a chair

in his room. There is a sofa and a bookcase, too. The desk is between (在……之间) the bed and the

bookcase. His schoolbag and pencil case are on the desk. Some pencils, a pen and a ruler are in the

pencil case. Jim's sofa is near the desk. His baseball is under the bed.

1. There is ________ in his room．

A. a desk and a chair

B. a desk and some chairs

C. a chair and some desks

D. some chairs and desks

2. The desk is between the ________ and the ________

A. sofa; bookcase

B. bed; bookcase

C. bed: sofa

D. bed; pencil case．

3. Jim's pencil case is ________

A. on the desk

B. next to the desk

C. under the bed

D. in the desk

4. Jim's bed is near the ________

A. sofa

B. plants

C. desk

D. chair

5. Jim's ________ is under the bed．

A. pen

B. baseball．

C. ruler

D. pencil case

问答题简答题

齿轮传动的主要特点。