在检修带电电气设备时，应有措施，预防人身触电事故。（）
参考答案：错
I was very busy that day. Otherwise I _________in the discussion. [ ]
A. would take party
B. had taken part
C. took part
D. would have taken part
下列均能为人体提供能量的一组营养物质是（ ）
A．糖类、脂肪、维生素
B．糖类、脂肪、蛋白质
C．糖类、脂肪、无机盐
D．糖类、蛋白质、维生素
