【简答题】通常认为,价格上升而交易量下降是股票价格随后将下跌的信号。 ( )
【单选题】The star has been playing basketball ______ he was a boy.
【判断题】在中间平面内,普通圆柱蜗杆传动相当于直齿条与直齿轮传动。
【单选题】Jim and I ______ a basketball. We play basketball after school. [ ]
【多选题】下列关于肾病综合征并发症的叙述,正确的是
【单选题】—Is Alice playing both basketball and tennis for your school? —She _____. But now she has given up playing basketball. [ ]