在含盐10%的450克盐水中,再放入50克水,那么新盐水的含盐率是______.
450×10%450+50×100%=9%;
答:新盐水的含盐率是9%;
故答案为:9%.
One of the study areas in ______ is how the interpretation and use of utterances depends on knowledge of the world.
A. discourse analysis B. anthropologyC. contrastive analysis D. pragmatics
防护林的作用是什么?