1)
What are the words "Meleches Avodah" coming to preclude?
1.
Rosh Hashanah 29b: It excludes Teki'as Shofar and removing bread from the oven from the prohibition, which are Chochmos and not Melachos. 1
1
This Derashah actually pertains to Shabbos. See Torah Temimah, note 87.
2)
Which fire-offerings is the Pasuk referring to?
1.
Rashi: It is referring to the Musafin listed in Bamidbar 29:1-6.
