下列标准中哪项不是我国新标准采用的职业接触限值()
A.最高容许浓度
B.时间加权平均容许浓度
C.短时间接触阈限制
D.短时间接触容许浓度
E.以上答案均正确
参考答案:C
引起失血性休克的急性失血量,最低为全身血量的()
A.20%
B.25%
C.30%
D.35%
E.40%
After the rebuilding our school is becoming ________. [ ]
A. more and more beautiful
B. more beautiful and beautiful
C. beautiful and beautiful
D. the more beautiful