空心墩按壁厚分为厚壁与薄壁，其中t/D( )为厚壁。
A．≥1/10
B．≥1/8
C．≤1/12
D．≤1/6
参考答案：A
Since Jack was laid off from his job three months ago, he a new one, but without luck.
A．1ooked for
B．had looked for
C．is looking for
D．has been loking for
四川自贡的西秦会馆是哪个行业的会馆？（）
A、布业会馆
B、盐业会馆
C、木业会馆
D、珠宝业会馆
