题目内容
细胞之间通过（）进行水分和物质交换。
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沙瓤西瓜经常一粒一粒的，这是由于细胞胞间层溶解产生的现象。
幼嫩细胞的细胞壁由胞间层、初生壁和次生壁组成。
纹孔是细胞壁上真正的孔洞。
Directions: In this section, you are going to read a passage with ten statements attached to it. Each statement contains information given in one of the paragraphs. Identify the paragraph from which the information is derived. You may choose a paragraph more than once. Each paragraph is marked with a letter. Answer the questions by marking the corresponding letter on Answer Sheet 2.How to eat well
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