ATM所能支持的业务类型有()。
A.既支持同步类型业务,又支持异步类型业务
B.只支持同步类型业务
C.只支持异步类型业务
D.只支持高速业务
参考答案:A
我国著名科学家钱学森1958年写的《工程控制论》是控制论学科的奠基性文献之一()
When operating the air supply system in a covered lifeboat the().
A.fuel supply valve should be closed
B.hatches,doors,and oar ports should be closed
C.air cylinder shut-off valve should be closed
D.engine should be shut off