【30】A．operationB．productionC．processionD．action

块操作的英文是（)。A.BLOCKOD OPERATIONB.BLOCKED RECORDSC.BLOCKING FACTORD.BLOCKMARK

【C12】A．productB．productionC．produceD．output

【C18】A．productsB．productionC．producesD．productivity

A．your operationB．is your operationC．your operation isD．will your operation

According to Obamas advisers,A．great actions should be taken.B．president"s action on busin

【C2】A．operationB．behaviorC．movementD．development