题目

There isn’t ________ in the fridge. Let’s go and buy some.A.enough milk B.a lot milk C.milk enough D.many milk 答案：【答案】A【解析】句意：冰箱里没有足够的牛奶了。我们去买一些吧。考查形容词辨析。enough milk足够的牛奶；a lot milk形式错误，应为a lot of milk；milk enough 形式错误，enough修饰名词时，放在名词前面；many milk形式错误，many修饰可数名词，而milk为不可数名词。故选A。下列化学方程式书写正确，且符合题意的是（ ）A．细铁丝在氧气中燃烧：4Fe+3O22Fe2O3B．电解水：2H2OH2↑+O2↑C．溶洞的形成：Ca（HCO3）2CaCO3↓+H2O+CO2↑D．用磷测定空气中氧气的含量：4P+5O22P2O5