GB/T5031《塔式起重机》是国家强制性标准。（)

A、《塔式起重机安全规程》GB/T5144

B、《塔式起重机》GB/T5031

C、《塔式起重机》GB/T5031及《塔式起重机安全规程》GB/T5144

D、《起重机设计规范》GB/T3811

A.20cm²

B.15cm²

C.10cm²

D.25cm²

A.IP65

B.IP45

C.IP56

D.IP44

A.80dB(A)

B.75dB(A)

C.90dB(A)

D.85dB(A)

A.80

B.85

C.90

D.95

A.1.2

B.1.3

C.1.13

D.1.1

A.1.40

B.1.48

C.1.56

D.1.3

A.-20℃～+40℃

B.-15℃～+40℃

C.-30℃～+40℃

D.-20℃～+50℃

A.≤50℃

B.≤55℃

C.≤60℃

D.≤65℃