False.
It is a re-presentation of the same one-time Sacrifice on Calvary.
From the Catechism: 1366 The Eucharist is thus a sacrifice because it re-presents (makes present) the sacrifice of the cross, because it is its memorial and because it applies its fruit:
[Christ], our Lord and God, was once and for all to offer himself to God the Father by his death on the altar of the cross, to accomplish there an everlasting redemption. But because his priesthood was not to end with his death, at the Last Supper “on the night when he was betrayed,” [he wanted] to leave to his beloved spouse the Church a visible sacrifice (as the nature of man demands) by which the bloody sacrifice which he was to accomplish once for all on the cross would be re-presented, its memory perpetuated until the end of the world, and its salutary power be applied to the forgiveness of the sins we daily commit.189
You quote the “re-presents” but ignore the statement that the Eucharist is a sacrifice. The word I find interesting in your Catechism is “salutary.” It implies that without the Eucharist the salutary power would not be applied. You are sort of avoiding the crux of the issue by focusing on the “re-presents” and ignoring the notion of “sacrifice” and “salutary power” which is where the objection to your theology really lies.
No it isn't...It is a representation of the Last Supper...Unless you guys are nailing something to a cross at every Mass that you haven't told us about...