【单选题】阅读理解,请选择正确的答案。The basic components (构成) of a typical chemical process are shown in Fig. 1, in which each block (方框) represents (代表) a stage in the overall (全部) process for producing a product from the...
A.
Figure 1 represents particular process.
B.
each block in Fig.1 represents a stage of particular process.
C.
the complexity of each stage will depend on the cost.
D.
not all stages in Fig.1 are included in every chemical process.