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【单选题】
下列关于昆虫的肢的叙述中，错误的是（）。A.
昆虫的头、胸、腹三部分各长有1对足
B.
昆虫的3对足分别称为前足、中足、后足
C.
螳螂、蝼蛄的前足分别演化成了“捕捉足”、“开掘足”
D.
蝗虫、龙虱的后足分别演化成了“跳跃足”、“游泳足”
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【简答题】婴幼儿化脓性脑膜炎最常见的病原体是A. 大肠杆菌 B. 肺炎双球菌 C. 金黄色葡萄球菌 D. 溶血性链球菌 E. 轮状病毒
【简答题】设备布置首先满足 、 、物流、环保、 的基础上,应尽可能做到方便快捷、物流畅通,还有操作、维修、安装、外观等方面的要求。
【简答题】What is said about the rainfall in America’s West? A) There is much more rainfall in California than in Utah. B) The water it delivers becomes lighter when it moves inland. C) Its chemical composition...
【单选题】Why is it more likely for some families to produce fraternal(异卵双生)twins?
A.
There is a tradition in the family.
B.
There is a secret diet in the family.
C.
There is a hereditary tendency in the family.
D.
There is a special way in the family.
【简答题】简述分布式文件系统
【单选题】What is said about the rainfall in America's West?
A.
There is much more rainfall in California than in Utah.
B.
The water it delivers becomes lighter when it moves inland.
C.
Its chemical composition is less stable than in other areas.
D.
It gathers more light isotopes as it moves eastward.
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