施工带电作业,穿了防静电服,可不必戴防静电手套。()
参考答案:错
①请你在图甲中作出反射光线OB的入射光线AO,并在图1乙中完成透镜的光路图.
②请你在图2中画出足球被运动员踢出后受力的示意图(不计空气阻力).
I'd like to give them something _____ everything they've done for us. [ ]
A. in place of
B. in return for
C. in spite of
D. in case of