铁口的烘炉导管，应伸到炉底（）处。
A.中心
B.炉缸直径的1/3
C.炉缸直径的1/4
参考答案：A
-I heard Back Street would sing at the New Theater.
-Where did you _____?
A．pick that up
B．put that up
C．make that up
D．take that up
中国是维护世界和平与稳定的重要力量。
