水电站机组启动验收的各台机组运行时间为投入系统带额定出力连续运行 ( )。
A.24h
B.36h
C.48h
D.72h
参考答案:D
下列哪个是显影液的抑制剂()
A.KBr
B.Na2SO3
C.Na2CO3
D.Na2S2O3
E.CH2COOH
Mr. Kong, who is in poor health, _____ such a hard life. [ ]
A. is suit to living
B. is suit to live
C. is suited to living
D. is suited to live