Preservatives, at the level
included in commercial pet foods, have never been scientifically demonstrated
to cause any problems in pets (or people) at less than 100 times the levels
found in such foods. On the other hand, the current policy for many cat food
manufacturers is toward using natural pre...
句子:Dudley had spent most
of the summer in the kitchen, his piggy little eyes fixed on the screen and his
five chins wobbling as he ate continually.问题:his piggy little eyes fixed on the screen and his
five chins wobbling 这个句子是独立主格吗?主要修饰前面的主句“Dudle...
关于 in the past (last) few years 这类介词短语,我知道以下知识点:一是它们通常与现在完成时连用;二是其中的介词 in 也可以换成 during / for,即说成during the past (last) few years, for the past (last) few years。我的疑问是:这类用法中的介...