120,20,(),-4
A.0
B.16
C.18
D.19
参考答案:A
解析:
答:选A, 120=53-5;20=52-5;0=51-5;-4=50-5
This part of the country is ______ for its many historic houses.
A.obvious
B.remarkable
C.abundant
D.sufficient
正常情况下决定停放上渣时间依据是()。
A.铁口已打
B.已见下渣
C.打开渣口后自动喷煤气火焰