在采用一般检验方法来检验船机零件时,轮机人员往往首先考虑和采用的方法是()。
A.观察法
B.听响法
C.测量法
D.液压试验法
参考答案:A
读句子,判断正(√)误(×)。
( ) 1. A cow can draw and write.
( ) 2. A horse can run.
( ) 3. A rabbit can't swim.
( ) 4. A pig has a tail.
( ) 5. A duck has four legs.
( ) 6. A donkey can walk.
( ) 7. Fish can swim.
( ) 8. A bird has two wings.
( ) 9. Goats and sheep are different.
( ) 10. A boy can walk forward.
龋病的药物治疗中常用药物不包括()
A.75%氟化钠甘油糊剂
B.8%氟化亚锡溶液
C.含氟凝胶
D.碘酚
E.硝酸银