方波发生器设计 汇编语言编程答:cjne a,#00h,ddh ;1~~10hz 无法定时 mov a,51h cjne a,#0ah,bbjj mov th1,3ch mov tl1,#0b0h ljmp mainbbjj:jc xdh ljmp ddhxdh:mov 75h,#9eh mov 76h,#58H cjne a,#1,qq mov 74h,#20 mov r5,74h ljmp main qq:cjne a,#2,rrr mov 74h,#10 mov r5,74h ljmp mainrrr:cjn...
(一)洞庭湖区第四纪红土综合剖面答:2.黄土山组上段(Qp1hs2) 见于常德黄土山剖面,所见岩性上部为紫红色、灰褐色、灰白色、黄白色等杂色粘土,含少量砂质,厚0.6~3.0m不等,底界不平整。下部为棕黄色砂、砂砾石层,含铁盘,砂为中粗砂,呈透镜状;该层以砂砾石为主,砾石成分主要为脉石英、硅质岩、变质砂岩,结构紧密,砾径一般2~3cm,个别5~8cm,...