下列焊接检验方法中()属于非破坏性检验。
A.拉伸试验
B.致密性试验
C.射线探伤
D.水压试验
E.超声波探伤
F.外观检验
参考答案:B, C, D, E, F
用所给单词的适当形式填空。
1. They _____ (visit) Shanghai next month.
2. That is an _____ (excite) story.
3. It's very important for us _____ (learn) English well.
4. We enjoyed _____ (our) in the park last Sunday.
5. I plan ______ (improve) my English this term.
下列哪种因素与血栓形成无关()
A.血管内皮损伤
B.血流缓慢
C.血小板数量增多
D.纤溶酶增加
E.漩涡产生