什么叫底板？
参考答案：
煤层下面的岩层叫底板。
前臂缺血性肌挛缩，多见于
A．肱骨髁上骨折
B．桡骨骨折
C．尺骨骨折
D．尺、桡骨双折
E．Colles骨折
On Teachers' Day,we all went to school______to see our teachers.
A. especially B. specially C. particularly D. attentively
