Even plants can run a fever, especially when they’’re under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3,000 feet away-straight up. A decade ago, adapting the infrared scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide (杀虫剂) spraying rather than rain poison on a whole field, which invariably includes plants that don’’t have pest (害虫) problems. Even better, Paley’’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3,000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color-coded map showing where plants were running "fevers"; Farmers could then spot-spray, using 40 to 70 percent less pesticide than they otherwise would. The bad news is that Paley’’s company closed down in 1984, after only three years. Farmers resisted the new technology and long-term backers were hard to find. But with the renewed concern about pesticides on produce, and refinements in infrared scanning, Paley hopes to get back into operation. Agriculture experts have no doubt the technology works. "This technique can be used on 75 percent of agricultural land in the United States." says George Oerther of Texas A&M. Ray Jackson, who recently retired from the Department of Agriculture, thinks remote infrared crop scanning could be adopted by the end of the decade. But only if Paley finds the financial backing which he failed to obtain 10 years ago. Infrared scanning technology may be brought back into operation because of______.
A. the desire of fanners to improve the quality of their produce
B. growing concern about the excessive use of pesticides on crops
C. the forceful promotion by the Department of Agriculture
D. full support from agricultural experts
当前,《风声》、《亮剑》等红色剧走红,反映了理想主义回潮。请你结合自己的认识,谈一下这些现象对你有哪些启示。 要求:引申合理,观点明确,条理清晰,字数不超过300字。
以上程序的输出结果是______。 #define MIN(x,y) (x)<(y)(x):(y) main() { int a=5,b=2,c=3,d=3,t: t=MIN(a+b,c+d)*10;printf("%d\n" t);}
请编制程序,其功能是:将一个字符串中连续相同的字符仅用一个字符代替,生成一个新的字符串。字符串以00H结束,长度不超过20个字节。 例如: 原字符串为:41H,41H,41H,42H,31H,31H,...,00H(’AAAB11’) 新字符串为:41H,42H,31H,...,00H(’AB1’) 部分程序已给出,其中原始数据由过程LOAD从文件INPUT1.DAT中读入SOURCE开始的内存单元中,运算结果要求从RESULT开始存放,由过程SAVE保存到文件OUTPUT1.DAT中。 请填空BEGIN和END之间已给出的源程序使其完整,空白已用横线标出,每个空白一般只需一条指令,但采用功能相当的多条指令亦可,或删除BEGIN和END之间原有的代码并自行编程来完成所要求的功能。 对程序必须进行汇编,并与IO.OBJ链接产生可执行文件,最终运行程序产生结果。调试中若发现整个程序中存在错误之处,请加以修改。 [试题程序] EXTRN LOAD:FAR,SAVE:FAR LEN EQU 20 DSEG SEGMENT SOURCE DB LEN DUP() RESULT DB LEN DUP(0) NAME0 DB ’INPUT1.DAT’,0 NAME1 DB ’OUTPUT1.DAT’,0 DSEG ENDS SSEG SEGMENT STACK DW 256 DUP() SSEG ENDS CSEG SEGMENT ASSUME CS:CSEG,SS:SSEG,DS:DSEG START PROC FAR PUSH DS XOR AX,AX PUSH AX MOV AX,DSEG MOV DS,AX LEA DX,SOURCE LEA SI,NAME0 MOV CX,LEN CALL LOAD ;LOAD STRING FROM FILE ; ******BEGIN****** ;在BEGIN和END之间补充代码 ; ******END****** LEA DX,RESULT LEA SI,NAME1 CALL SAVE ;SAVE RESULT TO FILE RET START ENDP CSEG ENDS END START