机械法：接头强度约为本体的35～40%，对滚筒有损害，只适用于织物芯层胶带。用于短距离且检修时间段的场合。

有钢卡连接、合叶连接、塔头铆钉连接，接头强度约为本体的80 ～90%。

塑化法：用于塑料带的连接，接头强度可达本体的75 ～80%。

氯厂胶粘结剂和氰酸酯固化剂配合法：速度快，接近本体强度。

正确

错误

防酸服

防毒面具

防辐射服

防毒服

异烟肼

利福平

吡嗪酰胺

链霉素

乙胺丁醇

水平构件不得采用绑扎接头，垂直构件不得采用机械接头

现场由焊工专门制作焊接接头，作为焊接试件

同一受力钢筋不得出现两个以上的接头

螺纹连接的做法不适用于φ16以下的钢筋

受拉钢筋直径大于25时，不宜再采用绑扎接头

吡嗪酰胺

利福平

异烟肼

乙胺丁醇

链霉素

e nvironment

necessarily

allowed

cheated

international

admitted

hardly

necessary

joy

excitement K. difficulty L. communication A relative of mine once asked me:" Why should a Chinese take time to learn a language that is not his own?" Obviously he has___ 51 ____in learning a foreign language. He is not the only one who is mentally against English learning. One reason, as I suspect, is the way English is taught. The emphasis on memorization is such that no ___ 52 ____is left in the process, only endless irritation. What students are presented in the classroom is not the language in real-world ___ 53 ____. A Chinese student with extremely high scores for American standardized tests was ___ 54 ____ into one of the most famous universities. But his professors soon found out that he could___ 55 ____understand the lesson . Suspecting tha t he___ 56 ___in the tests, the school demanded he repeat them. Again, he passed with high scores. Not till then did they realize that the student had mastered the techniques for dealing with the tests, not___ 57 ____the skills of using the language. Many people take TOFEL, IELTS, GRE, annual Band 4 and Band 6 exams not because they work in areas where English is a____ 58 ___tool, but because they have to do it for job promotion or enrolment in certain programs. Must English learning be such a pain in the neck? Create a(n)___ 59 ___ where learning English is natural and painless. Don't make it compulsory for people whose work or major does not require it. China will not become more__60 ___ by adding millions of people who can only say a simple "Hello."