参照国家有关色差规定,男子夜礼服袖缝色差应()。
A、高于4级
B、不低于4级
C、高于5级
D、不低于5级
参考答案:B
--- We need three single rooms for the first week in June.
--- ____. The hotel’s not busy then.
A.Never mind
B.Don’t bother
C.No problem
D.It doesn’t matter
热轧光圆钢筋进行力学和冷弯性能检测时应按批次进行,每批重量不大于()。
A.40T
B.50T
C.60T
D.70T