题目内容：
The most common symptoms of cat heartworm disease are（）
A.Drowsiness
B.Cough
C.Difficulty breathing
D.Vomiting
参考答案：
选择题：The most common symptoms of cat heartworm disease are（）
- 题目分类：中国大学MOOC慕课
- 题目类型：选择题
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Babesia gibsoni can be transmitted through the tick egg.
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物体厚度越大，X射线的穿透本领越 。（请填写大或者小）The greater the thickness of the
物体厚度越大，X射线的穿透本领越 。（请填写大或者小）The greater the thickness of the object, the the X-ray penetration power.
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