What is defined as and area, excluding sea areas A1 and A2, within the coverage of an INMARSAT geostationary satellite in which continuous alerting is available？
A. Ocean Area Regions AOR-E, AOR-W, POR or IOR
B. Sea Area A3
C. Sea Area A4
D. Coastal and Inland Waters
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What is defined as an area outside sea areas A1, A2 and A3？
AOR-E
B. AOR-W
Coastal and inland waters
D. A4
Which of the following is a required GMDSS function？
A. Transmit and receive location signals
B. Transmit and receive general communications
C. Both of these
D. None of these
目前应用最为广泛的无损检测方法中，能够发现焊缝内部气孔、夹渣、裂纹及未焊透等缺陷并能留下原始记录的是()。
A. 磁性探伤
B. 超声波探伤
C. 射线探伤
D. 渗透探伤
甲说：节气门拉索调整不当会使自动变速器不能强制降挡;乙说：强制降挡开关故障不会使自动变速器不能强制降挡。以下说法正确的是()。
A. 甲正确
B. 乙正确
C. 甲乙都不正确
D. 甲乙都正确
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