机械加工企业的煤气站、天然气和煤气储配站的水煤气、半水煤气的含氧量达到()时必须停炉。
A. 0.002
B. 0.01
C. 0.015
D. 0.02
A.128.96.36.0/23B.128.96.36.0/24C.12.96.37.0.23D.128.96.37.0/24
A. 128.96.36.0/23
B. 128.96.36.0/24
C. 12.96.37.0.23
D. 128.96.37.0/24
【C13】
A. in
B. on
C. with
D. of
Once our hens started laying eggs, we had such a ________ of eggs that we were giving many
A. output
B. surplus
C. production
D. plenty