SMA面层的碾压应采用钢轮压路机,不宜使用轮胎压路机。( )
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SMA面层的碾压可以采用振动压路机,但要避免粗集料碾碎和泛油现象发生。( )
A. 对
B. 错
A new report suggests that chewing gum may be a health h______(危险，危害).
He studied philosophy and p______(心理学) at Yale.
Doing it properly makes c______(相当大的，相当重要的) demands on our time.
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