①某鞋厂劳动生产率先提高,该行业劳动生产率未变 ②制鞋行业劳动生产率普遍提高,某鞋厂劳动成产率未变 ③某鞋厂与本行业劳动生产率同时提高相同幅度
⒈____ A. Ff B. Mm C. Yy D. Xx
⒉____ A. name B. thank C. am D. that
⒊____ A. teacher B. great C. please D. eat
⒋____ A. person B. teacher C. father D. sister
⒌____ A. mother B. brother C. father D. thank
已知正方体ABCD,求证:平面AB1D1∥平面C1BD.