在堤身压实作业中,采用振动碾时行走速度应为()km/h。
A.≤1
B.≤1.5
C.≤2
D.≤2.5
参考答案:C
that ,or one day you may come to be ashamed of what you have done.
A.Stop doing
B.If you stop doing
C.If you don’t stop doing
D.You stop doing
下列检查方法哪项为首选
A.肝脏B超
B.肝脏CT
C.肝脏MRI
D.X线肝血管造影
E.一个月盾复查AFP