神经调节的基本方式是
A：神经纤维
B：反射弧
C：反射
D：神经元
A. are B. pandas C. fat D. this E. tiger
Ann and Sam are in the zoo.
Ann：What's ____?
Sam：It's a ____. It's big.
Ann：What ____ they?
Sam：They're ____. They're ____.
下列史实与法国沦亡无关的是
降水的最主要形式是（ ）
