铲钉检查时为安全起见，半个节点板内同时铲去钉头的铆钉数不得超过（）个。
A.2
B.3
C.4
D.5
参考答案：D
When joining a vessel，do not forget personal documents and your spectacles，and（）if necessary.
A.drug
B.remedy
C.medicine
D.healer
偷税行为应如何处罚？
