【正文】 ple there make me feel fulfilled. The first round of spring auction season in Beijing ended last week, but it failed to create much spring in the art market. Although two pieces of Chinese painting fetched more than 100 million yuan, the decline in trading volume and sa le rate showed a downturn this year. In the ―Grand View: Chinese Painting Highlight‖ session at China Guardian 2021 spring auctions, Pan Tianshou’s representative work Eagle, Rock and Flora hit a record auction price of 279 million yuan, while Li Keran’s masterwork Jinggang Mountain fetched million yuan, an unexpected high in recent years. However, the trading volume fells to billion yuan from billion yuan in the same period the year before. The Huangchen 2021 Spring Auctions, which recorded million yuan in total sales, experienced the same. The section number went down to 5 from 12 pared to last year. According to expert Shao Jianwu, the art market did not attract much excitement this year due to the booming stock market and the persistent problems of fery and fake deals. The two pieces of Chinese painting notched up high price this spring due to their own value not due to a revival in the market. The successful transaction of two works with a hammer price of more than 100 million yuan once again confirms that valuable and rare works of high quality always earn the longlasting high price. Chinese painting and calligraphy is still the pillar of the market. However, the overall sales rate has dropped slightly, which reflects the demand for the ordinary auction goods has weakened,‖ said the president of China Guardian’s Hu Yanyan. Besides, the entry of new buyers also makes certain changes to the direction of purchasing. In a word, the overall market trend is very unpredictable. Although China Guardian 2021 Spring Auctions has achieved remarkable results, it does not mean that the market has walked out of the predicament. We still have to wait for the big economic boom to invigorate the art market.‖ Even so, the hot pursuit of some special items appeared this spring. A special session of China Guardian Spring Auctions titled ―Fine Gilt—Bronze Buddhist Images‖ achieved a great deal with total sales volume of million yuan and 92 percent sale rate. The 5th Shamar Rinpoche Statue from 1617th century of Tibet was sold for million yuan. The Beijing Chengxuan Auctions featured almost 2,800 items of coins and stamps in three sessions with good sale rate. The Huachen Auctions also set a special session of photographs under the condition of largescale decline of auction sessions. There was a palpable dull thud of disappointment that acpanied the return of the imperial entourage of Zhen Huan to her homeland. It followed a couple years of hushed excitement as Chinese fans were fed tidbits about their proud concubine who was supposed to conquer the high ground of the North American market. Zhen Huan is, of course, the title character of The Legend of Zhen Huan, a 2021 television series that swept China off its feet and later took other Asian countries by storm. Two years ago, it was reported that HBO, a premium cable service headquartered in the United States, was going to air it in North America after some modification. Now, a condensed version that provides English subtitles but no dubbing has finally been made available on Netflix for online streaming. This version, highly anticipated as a milestone in China39。s performers of the troupe still tour the region39。他那誨人不倦、寬厚樸實(shí)的作風(fēng)給我們留下了不可磨滅的影響，是我學(xué)習(xí)的榜樣，使我終生受益無窮。 (5) 啟動(dòng)搶答倒計(jì)時(shí)，開始搶答 0閃爍狀態(tài)下，當(dāng)主持人宣布搶答開始時(shí)，馬上按一下 搶答計(jì)時(shí) 鍵，屏幕顯示所設(shè)定的搶答倒計(jì)時(shí)時(shí)間并開始倒計(jì)時(shí)，提示倒計(jì)時(shí)時(shí)間馬上臨近結(jié)束。 向下運(yùn)行 滅并停響 CLR RING MOV R3,0AH MOV R4,0AH MOV R5,0AH。如按下停止鍵退出 ACALL DISPLAY JB OK,ACCOUT。如果 R1 為 0, R1 就置 99， DEC R1 ACALL DELAY1 AJMP INT0SUB SETR1: MOV R1,63H ACALL DELAY1 AJMP INT0SUB BACK0: RETI ； ***INT1(回答時(shí)間 R2 調(diào)整程序 )*** INT1SUB:MOV A,R2 MOV B,0AH DIV AB MOV R5,A MOV R4,B MOV R3,0AH ACALL DISPLAY JNB ,INC1 JNB ,DEC1 JNB ,BACK1 AJMP INT1SUB INC1: MOV A,R2 CJNE A,63H,ADD1 MOV R2,00H ACALL DELAY1 AJMP INT1SUB ADD1: INC R2 ACALL DELAY1 AJMP INT1SUB DEC1: MOV A,R2 JZ SETR2 DEC R2 西南民族大學(xué)畢業(yè)設(shè)計(jì) 基于 8051 單片機(jī)的 8 路搶答器 15 ACALL DELAY1 AJMP INT1SUB SETR2: MOV R2,63H ACALL DELAY1 AJMP INT1SUB BACK1: RETI ； ***倒計(jì)時(shí)程序 (搶答倒計(jì)時(shí)和回答倒計(jì)時(shí)都跳到改程序 )*** COUNT: MOV R0,00H。一開始就運(yùn)行定時(shí)器 ,以開始顯示 ,重置 TH1/TL1 就可以了 ； ***查詢程序 *** START:MOV R5,0BH MOV R4,0BH MOV R3,0BH ACALL DISPLAY。 PR 為控制信號(hào)，當(dāng) PR 為高電平時(shí)，多諧振蕩器工作，反之，電路停振。 西南民族大學(xué)本科畢業(yè)論文 8 定時(shí)電路 設(shè)計(jì) 為了達(dá)到搶答的合理性、完整性、可控性，需根據(jù)題目的難易程度的不同設(shè)定相應(yīng)的搶答時(shí)間。如果再次搶答必須由主持人再次操作 清除 和 開始 狀態(tài)開關(guān)。預(yù)置分?jǐn)?shù)可由主持人設(shè)定，并顯示在每名選手的計(jì)分牌上，選手答對(duì)加 10 分，答錯(cuò)扣 10 分。我們采用了數(shù)字顯示器直接指示，自動(dòng)鎖存顯示結(jié)果，并自動(dòng)復(fù)位的設(shè)計(jì)思想，因而本搶答器具有顯示直觀，不需要人干預(yù)的特點(diǎn)。 本設(shè)計(jì)是以搶 答為出發(fā)點(diǎn)。比賽前，將參賽組從 0 至 7 編號(hào)，每組發(fā)給對(duì)應(yīng)的一個(gè)發(fā)射器。 基于這個(gè)設(shè)計(jì)的上述要求，根據(jù)功能要求，須設(shè)計(jì)有搶答電路、譯碼顯示電路、主持人控制電路、定時(shí)電路、報(bào)警電路，各個(gè)電路都有其自己的功能。此外， 1Q＝ 1，使 74LS148 =1，處于禁止?fàn)顟B(tài)，封鎖其他按鍵的輸入。 報(bào)警電路 設(shè)計(jì) 西南民族大學(xué)畢業(yè)設(shè)計(jì) 基于 8051 單片機(jī)的 8 路搶答器 9 報(bào)警電路用于報(bào)警，當(dāng)遇到報(bào)警信號(hào)時(shí)，發(fā)出警報(bào)。 為開始搶答， 為停止。搶答標(biāo)志位 ,用于 COUNT 只程序中判斷是否查詢搶答 MOV R3,0AH。十位存于 (30H) MOV 31H,B。因?yàn)榇痤}的計(jì)時(shí)不再查詢搶答 ,所以就鎖了搶答 AJMP COUNT TRUE1: ACALL BARK。查表顯示程序 ,利用 P0 口做段選碼口輸出 /P2 低三位做位選碼輸出 , MOV A,R5 MOVC A,A+DPTR MOV P2,01H MOV P0,A ACALL DELAY MOV DPTR,DAT2 MOV A,R4 MOVC A,A+DPTR