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【简答题】
完形填空。 When I was walking down the street the other day. I happened to find a small wallet 1 there. I 2 and opened it to see if I could find out the owner's name. There was 3 inside except a little money and an old photo - a picture of a woman and a girl about sixteen years old. The young one 4 the woman's daughter. I put the photo back and _5_ the wallet to the police station. I handed the wallet to a policeman. That evening I went to _6_ with my aunt and uncle. They also invited a young woman. So there were _7_ people at table. Her face was familiar. I was quite sure that we had met before, but I couldn't remember where I had seen her. _8_ the talk, the young woman happened to mention (提及) that she had lost her wallet that afternoon. Suddenly I knew where I had seen her. She was the mother of the young girl _9_ . She was very _10_ , of course, when I was able to tell her about her wallet. (     )1. A. lie (     )2. A. turned it off (     )3. A. something (     )4. A. looked for (     )5. A. took (     )6. A. see (     )7. A. four (     )8. A. In (     )9. A. at the police station (     )10. A. angry B. lain B. picked it up B. anything B. looked same B. carried B. have dinner B. three B. About B. on TV B. sad C. lying C. turned it on C. nothing C. seemed to C. brought C. visit C. five C. During C. in the street C. worried D. lay D. tried it out D. everything D. looked like D. went D. spend holiday D. many D. Between D. in the photo D. surprised
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【简答题】某发酵过程工艺规定操作温度为(40±2)℃。考虑到发酵效果,控制过程中温度偏离给定值最大不能超过6℃。现设计一定值控制系统,在阶跃扰动作用下的过渡过程曲线如图所示。试确定该系统的最大偏差、衰减比、余差、过渡时间和振荡周期等过渡过程指标?
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【单选题】明码标价是指经营者收购、销售商品和提供服务时公开标示商品价格、服务价格等有关情况的行为。经营者不得在标价之外加价出售商品,不得收取任何未予标明的费用。 根据上述定义,下列符合明码标价的是______。
A.
某地产置业有限公司X项目,售楼处价目表使用“成交价”标示销售价格,但部分已售房源标示的“成交价”高于实际成交价格
B.
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D.
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【单选题】下列寄生在马尾松、赤松等的腐朽根部,以菌核入药的是( )
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B.
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C.
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D.
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【单选题】Windows7操作系统的特点包括______
A.
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B.
多任务
C.
即插即用
D.
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【单选题】明码标价是指经营者收购、销售商品和提供服务时公开标示商品价格、服务价格等有关情况的行为。经营者不得在标价之外加价出售商品,不得收取任何未予标明的费用。 根据上述定义,下列符合明码标价的是:
A.
某地产置业有限公司X项目,售楼处价目表使用“成交价”标示销售价格,但部分已售房源标示的“成交价”高于实际成交价格
B.
北京物美某门店在销售500克海达小米窝头时,价格调整但未及时更换商品价格标签,造成标价每袋3.9元,实收每袋4.5元
C.
某品牌汽车统一标价为24万,但是如果要立刻提车就要加价2万,要选择白色还要再加价2万
D.
某商场内一款打特价的大1P空调,标价为2700元。商场进行店庆促销活动,部分商品可在原价的基础上8折销售,该空调没有参加此项活动
【简答题】某发酵过程工艺规定操作温度为(40±2)°C。考虑到发酵效果,控制过程中温度偏离给定值最大不能超过6°C。现设计一定值控制系统,在阶跃扰动作用下的过渡过程曲线如图所示。试确定该系统的最大偏差、衰减比、余差、过渡时间(按被控变量进入新稳态值的±2%即达到稳定来确定)和振荡周期等过渡过程指标,并回答该系统是否能够满足工艺要求?
【简答题】某发酵过程工艺规定的操作温度为 40 °C ,考虑发酵效果,要求控制过程中温度偏离给定值最大不得超过 6 °C 。现设计的定值温度控制系统,在阶跃扰动作用下的过渡过程曲线如下图,试求最大偏差、衰减比、余差、过渡时间( ± 2% )和振荡周期,该系统能否满足工艺要求?
【简答题】某发酵过程工艺规定操作温度为( 40 ± 2 )°C。考虑到发酵效果,控制过程中温度偏离给定值最大不能超过 6 °C。现设计一定值控制系统,在阶跃扰动作用下的过渡过程曲线如图 3 所示。试确定该系统的最大偏差、衰减比、余差、过渡时间和振荡周期等过渡过程指标,并回答该系统是否能够满足工艺要求?
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