烧结普通砖的强度等级有()。
A.MU7.5
B.MU30
C.MU35
D.MU40
参考答案:B
改错。
( ) 1. Where are my crayon? _______________
A B C
( ) 2. Is she on the study? _______________
( ) 3. My mom is in the live room. _______________
( ) 4. What can he sees in the bathroom? _______________
( ) 5. Where's the cats? _______________
现行公路沥青路面设计规范及施工技术规范等仅对桥面铺装的防水体系提出了原则性要求,该防水体系主要指底涂层和()的设置。
A.底基层
B.粘结层
C.面层
D.防水层