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【单选题】
海洋约占地球表面积的71%，对其进行开发利用的部分流程如图所示。下列说法错误的是（ ）A.
试剂1可以选用石灰乳
B.
从苦卤中提取Br 2 的反应的离子方程式为：2Br - + Cl 2 ＝2Cl - + Br 2
C.
工业上，电解熔融MgO冶炼可减小能耗
D.
可用BaCl 2 溶液除去粗盐中的SO 4 2 －
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【单选题】人们常用哪些技术指标来衡量一台工业机器人的性能?( ) 1自由度; 2工作范围; 3负载; 4最大工作速度; 5重复定位精度
A.
①②③④⑤
B.
①②⑤
C.
①②④
D.
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