题目内容
当建设工程条件相同时，用同类已完工程的预算或未完但已经过审查修正的工程预算审查拟建工程的方法是（）。
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眼睛能承受的可见光的最大亮度值约为( )cd/m2，紫外线照射( )h后眼睛会充血，( )mm以下短波紫外线可引起紫外线眼炎。
设CL=ODH，要使结果是CL=02H，应执行的指令是( )。
In the United States, teaching is playing a very important role in society. If teachers do not teach well, students could complain about it to the administrative offices in the university. If many students do not understand, people think that the teacher does not do a good job. The teacher has big responsibility to make sure students understand. Ina sense, students are consumers and the teacher is offering services.Students have the right to evaluate their teachers, and they usually do so at the end of each course. That evaluation includes lots of aspects of teaching, such as explanation, preparation, using good examples, answering questions, and organization of classes. Students should be able to make objective judgment about the teacher.Students are supposed to read required textbooks and recommended books before class. With- out reading them, they will find it very difficult to understand the class. Basic courses on doing re- search and writing papers are taught at the beginning of the program. They teach things very concretely and clearly. Students are expected to apply what they have learned in classes to their studies.Classes are usually divided into a series of lectures and seminars (研讨会)There are some lecture classes, where the teacher just gives a lecture, and students ask questions at the end. Most graduate level classes are lectures and discussions. Participating in discussions is very important. Higher level classes involve very little lecturing. They emphasize discussion and presentation by the students. According to the passage, good teachers should（）
生产性粉尘根据其性质可以分为( )、 ( )、 ( )，其中炸药属于 ( )。
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