做好劳动环境的优化，应从（）方面来做
A.照明与色彩
B.噪声
C.温度与湿度
D.绿化
E.增强人们环境保护意识
参考答案：A, B, C, D
It never occurred to me _____ you could succeed in persuading him to change his mind.
A．which
B．what
C．that
D．if
关于地坪层的构造层次，错误的是（）
A.面层、隔汽层、垫层、素土夯实层
B.面层、隔离层、垫层、素土夯实层
C.面层、防潮层、垫层、素土夯实层
D.构造层、填充层、垫层、素土夯实层
