问题详情：
He knows so much about Russia that he's universally acknowledged as a(n) _____ on Russian affairs.
A. authority B. routine C. privilege D. boundary
【回答】
A
知识点：名词
题型：选择题
相关文章
![42.34°= ° ' '']( "42.34°= ° ' ''")
42.34°= ° ' ''![已知△ABC∽△A'B'C'，且BC＝5cm，AC＝4cm，AB＝7cm，A'C'＝3cm,则△A'B'C'的...]( "已知△ABC∽△A'B'C'，且BC＝5cm，AC＝4cm，AB＝7cm，A'C'＝3cm,则△A'B'C'的...")
已知△ABC∽△A'B'C'，且BC＝5cm，AC＝4cm，AB＝7cm，A'C'＝3cm,则△A'B'C'的...![—It's9o'clock.I'mafraidIhavetoleave,]( "—It's9o'clock.I'mafraidIhavetoleave,")
—It's9o'clock.I'mafraidIhavetoleave,![Ilovesleeping.It'ssomethingI'mgoodat.There'snothingbett...]( "Ilovesleeping.It'ssomethingI'mgoodat.There'snothingbett...")
Ilovesleeping.It'ssomethingI'mgoodat.There'snothingbett...![I'mMissWang.I'mateacheratNo.2HighSchool.ThisisLiLei.He'...]( "I'mMissWang.I'mateacheratNo.2HighSchool.ThisisLiLei.He'...")
I'mMissWang.I'mateacheratNo.2HighSchool.ThisisLiLei.He'...![It'ssaidthatMoYan'sspeechwaswonderful.That'strue.Weclap...]( "It'ssaidthatMoYan'sspeechwaswonderful.That'strue.Weclap...")
It'ssaidthatMoYan'sspeechwaswonderful.That'strue.Weclap...![I'msorrytohaveyouwaitingsolongforMarcia,andI'mafraidit'...]( "I'msorrytohaveyouwaitingsolongforMarcia,andI'mafraidit'...")
I'msorrytohaveyouwaitingsolongforMarcia,andI'mafraidit'...![It'ssaidthatMoYan'sspeechwaswonderful.That'strue.Weclap...]( "It'ssaidthatMoYan'sspeechwaswonderful.That'strue.Weclap...")
It'ssaidthatMoYan'sspeechwaswonderful.That'strue.Weclap...
