床席上有喷溅血迹，正确提取此血迹的方法是：（）
A、整件提取
B、刮取
C、锯取
D、生理盐水蘸取
E、剪取
参考答案：B, D
--- _______ the banks? ---They are across from the hotel.
A．Where is
B．Are there
C．Is there
D．Where are
3a-（-2b-c）去括号得______．
