语法与词汇31.Not until the advent of histochemistry could the anatomist see through the microscope which cells carry specific enzymes or gauge how active these enzymes are in different cells under various conditions.
【正确答案】
C
【答案解析】本题中，gauge的意思是“测量”。C项“measure测量”符合题意，如：Mother measured me to see what size of dress I should have．(母亲给我量尺寸，好知道我该穿多大号的衣服。)其他三项“discern目睹；grasp抓住；estimate估计”都不正确。