What's this?It's( ) UFO.A.a B.an C.the D./无

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What''sthis?It''s()UFO.A.aB.anC.theD./无What''sthis?It''s()UFO.A.aB.anC.theD./无What''sthis?It''s()UFO.A.aB.

What's this?It's( ) UFO.A.a B.an C.the D./无
What's this?It's( ) UFO.A.a B.an C.the D./
无

What's this?It's( ) UFO.A.a B.an C.the D./无
答案A 因为UFO 是字母缩写而成,只能根据他的读音来.字母U的发音为[Ju:],第一个发音的音标是辅音.英语中究竟该使用a/ an取决于实际发音情况.