题目: It is said that many kids are worried about the year 2012, ____they think the earth will be destroyed by disasters. [ ]A. when B. where C. as D. which 答案: A
题型:填空题 用block out, block up, block one's way 或block off的适当形式填空。1. Police _____ the street after the explosion. 2. A big rock rolled down the hill and ____. We had to stop. 3. That wall _____ all the light. 4. They will have to ____ the entrance to the tunnel. 查看答案
题型:单项选择题 ()是一种新型管材,具有耐腐蚀,水力性能好(粗糙系数小),重量轻(钢材的1/4左右),双胶圈接口水密性能好,施工简便等优点。A、预应力钢筋混凝土管B、自应力钢筋混凝土管C、钢管D、玻璃钢管 查看答案
题型:单项选择题 根据以下信息,回答第225题至第227题。一公司正致力于开发一个新的工资软件包。公司的员工是按小时付薪的,在忙季还会有加班津贴。在淡季,员工会有带薪假期。公司有一个工资保证金方案,员工可以不必向各种慈善机构捐款。对这个新工资软件包的程序测试应在系统开发生命周期的()阶段进行。A.设计阶段B.构造阶段C.分析阶段D.实施阶段 查看答案