单选题
Research in the early 19th century showed______.
A、
rabies was an infectious disease
B、
man and all warm-blooded animals were easily infected with rabies
C、
stray dogs should be destroyed
D、
the disease had been permanently eliminated in some big cities
【正确答案】
A
【答案解析】
本题是事实细节题。问题是19世纪早期的试验证明了什么。从第二段第一句话可以看出试验证明狂犬病是可传染的。所以，选项A是正确答案。
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