生产UF4的主要设备：①卧式搅拌床反应器②流化床反应器③移动床反应器卧式搅拌床反应器、流化床反应器、移动床反应器设备性能差异的主要指标（）
A、UF4产品质量ABC
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Thereareonlytenapplesleftinthebaskets,_____thespoiltones.
Ilongtoalleviate__________,butIcannot.
Whataniceday!Howaboutthethreeofus_____awalkintheparknearby.
_____ifIhadarrivedyesterdaywithoutlettingyouknowbeforehand.
You____thatlettertoJames.However，youdidn't.
