扩展基础有垫层时钢筋保护层的厚度，下列哪一个数值是适当的？（）
A.≥25mm
B.≥30mm
C.≥40mm
D.≥50mm
参考答案：C
His pale face suggested that he ______ ill and the teacher suggested that he _______ the doctor.
A．was, should see
B．should be, saw
C．were, had seen
D．should be, see,
在考试操作中出现长时间骑轧车道分界线行驶应评判（）。
A.扣5分
B.扣10分
C.扣20分
D.不合格
