ChineseandRussianscientistshavereposedthatinplaces______str essisbuildingup,theradonlevelsofthewaterbuilduptoo.
A.what
B.that
C.which
D.where
正确答案:D[解析]中俄科学家报告指出凡是气压增大的地方,水中氡含量也会增大。where引导定语从句修饰places。

ChineseandRussianscientistshavereposedthatinplaces______str essisbuildingup,theradonlevelsofthewaterbuilduptoo.
A.what
B.that
C.which
D.where
正确答案:D