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填空。 Home Alone It was Sunday afternoon. My brother and I were alone at home. My parents went for a party and asked me to look after my brother. I was doing my homework while my younger brother was watching TV. Suddenly the doorbell rang. Ding-Dong! My brother thought that it was our parents, so he opened the 1 quickly. A tall man wearing a black raincoat stood outside. He said that he came to sell books and he 2 politely: 'Are your parents at home?' Without thinking, my brother said, 'No.' Then the man asked: 'Would you like to 3 some story books?' I told him we didn't want to buy. When I wanted to close the door, he suddenly pushed (推) the door very 4 and came into our house. He took out a 5 and ordered me to tie (绑) up my brother's hands with a rope (绳子). I tied up his hands in a special way so my brother could untie 6 easily. The man then tied my hands up and locked 7 of us in the kitchen. Soon, he went upstairs to 8 money. I taught my brother to untie the rope on his 9 . He then untied me. I rushed to the telephone to call the police, 10 the line was dead. The doors were all locked from the outside. It was lucky that the man 11 to lock the kitchen window. So we got out of the house through the kitchen window and went to the 12 pay phone to call the police. Soon 13 came to our house and the man was caught by the police. By that time, my parents had come home. We told them the whole story. My parents were 14 that we were not hurt. They told me that we shouldn't 15 the door to strangers. I learnt a lesson on safety. (     ) 1. A. window (     ) 2. A. asked (     ) 3. A. lend (     ) 4. A. politely (     ) 5. A. kiss (     ) 6. A. himself (     ) 7. A. most (     ) 8. A. look at (     ) 9. A. feet (     ) 10. A. and (     ) 11. A. wanted (     ) 12. A. farthest (     ) 13. A. my friends (     ) 14. A. happy (     ) 15. A. clean B. door B. ask B. borrow B. slowly B. knife B. itself B. some B. look after B. hands B. so B. liked B. nearest B. the police B. angry B. close C. book C. answered C. sell C. heavily C. gift C. herself C. both C. look like C. mouth C. or C. forgot C. largest C. the neighbors C. sad C. lock D. TV D. answer D. buy D. happily D. pen D. themselves D. all D. look for D. legs D. but D. tried D. smallest D. my parents D. tired D. open
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【多选题】下列关于两阶段法的叙述中,正确的有( )
A.
两阶段适用于所有各种类型的线性规划问题的求解
B.
两阶段法的优点是可以很好的适应利用计算机进行求解
C.
在第一阶段中,目标函数可以是原线性规划问题的目标函数
D.
第二阶段必须利用第一阶段计算的单纯形表,并务必保留人工变量所在列直至计算得到最优解
E.
第一阶段的目标是判断原线性规划问题是否有可行解
【多选题】如果部门劳动生产率不变,个别企业劳动生产率提高,则( )
A.
单位商品的价值不变
B.
该企业产品的个别价值低于社会价值
C.
单位商品的价值量增加
D.
该企业产品的个别劳动时间低于社会必要劳动时间
【单选题】已知醋酸的浓度为 0.1000mol/L , K a =1.75 ×10 -5 ,则该醋酸水溶液中 [H + ] 为( )
A.
1.32×10 -5 mol/L
B.
1.32×10 -4 mol/L
C.
1.32×10 -3 mol/L
D.
1.32×10 -2 mol/L
【单选题】已知醋酸的浓度为0.1000 mol L-1,Ka=1.75×10-5,则该醋酸水溶液中[H+]为
A.
1.32×10-5mol L-1
B.
1.32×10-4mol L-1
C.
1.32×10-3mol L-1
D.
1.32×10-2mol L-1
【单选题】已知醋酸的浓度为0.1000mol/L,Ka=1.75×10-5,则该醋酸水溶液中[H+]为
A.
1.32×10-5
B.
1.32×10-4
C.
1.32×10-3
D.
1.32×10-2
【单选题】以下对肝外胆管癌间接征象的描述哪项不正确()。
A.
扩张胆管截断变窄处的结节回声
B.
病灶以上胆道系统明显扩张
C.
肝脏弥漫性肿大
D.
肝门淋巴结肿大
E.
肝内有转移灶
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A.
甲亢高代谢,而钾的摄入不足
B.
大量钾离子从尿中排出
C.
大量钾离子从肠道排出
D.
血中钾离子向细胞内转移
E.
甲亢控制后本病可消除
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A.
不宜长途搬运
B.
保持大便通畅
C.
绝对卧床休息4-6周
D.
不可使用镇静剂,以免加重意识障碍
E.
使用钙离子拮抗剂,如尼莫地平,以解除脑血管痉挛
【单选题】ISP(因物网服务提供商)分配给你们公司的CIDR(无类域间路由)地址是165.247.116.96/27,那么你应该为该网络配置的子网掩码是()。
A.
255.255.255.128
B.
255.255.255.224
C.
255.255.255.240
D.
255.255.255.248
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