往复式缩机气缸内表面被拉伤超过圆周1/4,并有严重的沟槽、台阶时,应()。
A.镗缸修理
B.打磨修理即可
C.降量生产
D.维持原状
参考答案:A
— ________ your mother watch TV every day?
— ________ . She doesn’t like watching TV.
A.Do; No, she doesn’t
B.Does; No, she doesn’t
C.Do; Yes, she does
D.Does; Yes, she does
有机食品包括:();()两个层次。