RDD的操作有哪些 A: Transformatio B: Accumulator C: Action D: Broadcast

()=F0H,<br/>(R0)=30H, and (30H)=AAH. After execution of an instruction XCH A,<br/>@R0, accumulator will be,( ) A: AAH B: F0H C: 30H D: 78H

One function provided by a hydraulic accumulator is to______. A: provide<br/>an area where air can separate from the oil B: provide<br/>an area to separate solid contaminants from the oil C: act<br/>as an oil and water separator D: absorb<br/>shocks occurring in the system