脱碳工序脱碳液的总碱度愈高，吸收CO2能力愈强，总碱度应（）。
A.愈高愈好
B.维持在27～30%
C.愈低愈好
D.维持在40～45%
参考答案：B
对流免疫电泳的正确描述是（）
A.抗原分子向负极移动
B.抗体分子向正极移动
C.抗原、抗体相向移动
D.抗体分子不发生移动
E.抗原分子不发生移动
A circle graph shows how the MegaTech corporation allocates its Research and Development budget: 14% microphotonics; 24% home electronics; 15% food additives; 29% genetically modified microorganisms; 8% industrial lubricants; and the remainder for basic astrophysics. If the arc of each sector of the graph is proportional to the percentage of the budget it represents, how many degrees of the circle are used to represent basic astrophysics research ？（）
A. 8°
B. 10°
C. 18°
D. 36°
E. 52°
