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【简答题】
A. Choose the best answer Fifty years ago I had a young family of three boys. My husband Johnny and I left them with a friend while we made a trip to the cinema. It was dark and was raining hard. With the headlights shining on the road, we saw something ahead of us. Johnny pulled to a stop and I came out, ran to the grass and grabbed a small, wet, frightened creature. It was freezing cold and so tiny that it fit into the palm of my hand but I still wasn't sure what it was. It stayed close to me for warmth and comfort. I wrapped it safely in my woolen hat and suggested that my husband turn back and go home. We thought it was a baby rabbit because it had long ears, long hind legs and was greyish brown in color. Once home, we filled a box with old newspaper and a warm towel. We fed it milk and bread and hoped it would survive.We named our new animal Bobsy. We all loved it at first sight. Our boys were happy with the little animal and it seemed to enjoy all the attention. Sadly though, on the third day with us, it caught its back foot in a door and we quickly realized it was broken. We rushed to the vet, who said, "It's only a rabbit, I'll put it to sleep. "Our response was a very decisive, " No way ! ” We found another vet and were told that she was a baby hare. We were told we should continue to keep her in her box for a week and her foot would be fine. After her recovery, Bobsy learned to use the kitty litter tray. She would comb her long ears with her front paws. Her favourite treats were chocolate drops and she was so smart that she would help herself to them straight from the packet. The local paper heard about this and came to our house to take her photo and write a story about her. We had her for seven wonderful years before we moved to New Zealand and we will never forget her.
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举一反三
【单选题】下列毒品被称为迷药、蒙汗药的是________。
A.
K粉
B.
摇头丸
C.
海洛因
D.
三唑仑
【简答题】已知曲线C:ρsin(θ+ )= ,曲线P:ρ 2 -4ρcosθ+3=0, (1)求曲线C,P的直角坐标方程. (2)设曲线C和曲线P的交点为A,B,求|AB|.
【单选题】曲线C 1 的极坐标方程为:ρ=2sinθ,曲线C 2 的参数方程为: (t为参数),P在曲线C 1 上,Q在曲线C 2 上,则P与Q的最大距离为: [     ]
A.
B.
C.
1
【单选题】干燥曲线中,曲线 1 代表( ),曲线 2 代表( ),曲线 3 代表( )。
A.
干燥曲线,干燥速率曲线 , 食品温度曲线
B.
食品温度曲线,干燥速率曲线 , 干燥曲线
C.
干燥速率曲线 , 食品温度曲线,干燥曲线
D.
食品温度曲线, 干燥曲线 , 干燥速率曲线
【单选题】是构成机械的最小单元,也是制造机械时的最小单元。 A. 机器 B. 零件 C. 构件 D. 机构
A.
A
B.
B
C.
C
D.
D
【简答题】曲线 (α为参数)与曲线ρ 2 -2ρcosθ=0的直角坐标方程分别为(    ),(    ),两条曲线的交点个数为(    )个。
【简答题】已知双曲线 的离心率 ='2' ,则双曲线的焦距为 .
【简答题】若曲线C的极坐标方程为 ρcos 2 θ=2sinθ,则曲线C的普通方程为______.
【多选题】润滑系统检测的主要参数为(),这些参数既可表征润滑系的技术状况,又可反映曲柄连杆机构有关配合零件之间的技术状况。
A.
机油压力
B.
机油品质
C.
机油温度
D.
机油密度
【简答题】已知双曲线 ,点 在曲线 上,曲线 的离心率为 ,点 、 为曲线 上易于点A的任意两点, 为坐标原点。 (1)求曲线 上方程; (2)若 为曲线 的焦点,求 最大值; (3)若以 为直径的圆过点 ,求证:直线 过定点,并求出定点坐标。
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