Pure science, leading to the construction of a microscope, _____.

A. may lead to antiscientific, “impure” results
B. necessarily precedes applied science, leading to the discovery of a cell
C. is not always as pure as we suppose
D. necessarily results from applied science and the discovery of a cell
A. may lead to antiscientific, “impure” results
B. necessarily precedes applied science, leading to the discovery of a cell
C. is not always as pure as we suppose
D. necessarily results from applied science and the discovery of a cell

【答案】