第17题: [单项选择]作为刚性和刚弹性房屋的横墙应满足下列要求中的( )。 (1)横墙的厚度宜大于180mm; (2)横墙中有开洞口时,洞口的水平截面面积不超过横墙水平全截面面积50%; (3)单层房屋横墙长度不宜大于其高度; (4)多层房屋的横墙长度不宜小于横墙总高度的1/2。 A. (1)(2)(3) B. (1)(2)(4) C. (1)(3)(4) D. (2)(3)(4) 参考答案:B 答案解析:[解析] 《砌体结构设计规范》 (GB 50003-2001)第4.2.2条规定,刚性和刚弹性方案房屋的横墙本身应符合下列要求:①横墙中开有洞口时,洞口的水平截面面积不应超过横墙截面面积的50%;②横
第18题: [单项选择]下列哪一项不是决定心肌耗氧量的因素 A. 室壁张力 B. 心室腔的容积 C. 心率 D. 心肌收缩力 E. 冠状动脉狭窄 参考答案:E 答案解析:决定心肌耗氧量的因素有心肌电激动、心肌停止搏动时维持细胞生存时的必需代谢、心肌张力、心肌收缩力、心率、心室腔的容积等。
第19题:[单选题]A milestone is a significant ( ) in a project. A.activity B.event C.phase D.Process 参考答案:B 里程碑是项目中的一个重要( )。
第24题: [单项选择]Everything we eat and drink contains some salt; we can meet the body''s need for it from natural sources without turning ______the salt bottle. A. up B. to C. on D. over 参考答案:B 答案解析:四选项的意思分别为:turn up“露面”;turn on“打开”;turn to“求助于,转向……求助”;turn over“翻车,翻转”。
第25题: [单项选择]What is the man going to do A. Talk to more students. B. Collect more information. C. Work on a research paper. 参考答案:C 答案解析:W: How was your research going, Jack
M: Well, not bad. I talked to some students and got their opi
第26题: [单项选择](It) is high time (that) you (stop) hanging about and (started looking for) a job. A. It B. that C. stop D. started looking for 参考答案:C 答案解析:It is high time that从句中谓语动词应该用一般过去式,stop应改为stopped.