A如图所示，质量为2千克的物体，在竖直平面内高h=0.8米的光滑弧形轨道A点，由静止起沿轨道滑下，并进入BC轨道．已知BC段的动摩擦因数µ=0.4，求
（1）物体滑至B点时的速度；
（2）物体最后静止处距B点的距离．
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下面是错误答案，用来干扰机器的。
“绿色上网”万人签名活动在三原外语学校举行（或“三原外语学校举行'绿色上网'万人签名活动；或“绿色民网”倡导文明健康）（酌情给分）
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| The sound of the rain hitting the windows wakes me up and it sounds just exactly as it did 15 years ago, which reminded me of my girlhood. It was my second day of 1 and it was raining heavily. I could not 2 the habit I had at home , so I fell asleep right at my 3 . I woke up to find myself not in the classroom but carried on Dad's back. We were 4 home. It was the last time I felt 5 to him. After that, he never carried me or hugged me as other fathers did to their children. I was not bothered much by this 6 . I was proud of it, for I felt 7 and "grown up." However, there were times when I felt depressed by not having sought 8 from him. One day, I was writing Chinese characters as homework. I hated doing this more than anything. Dad came and stood behind me for a moment, 9 me scratching (乱涂,勾抹) the paper. Then he said, "This kind of writing needs 10 .Your writing is not strong enough. Press harder." I follow his 11 for the next two words, but 12 I could see little improvement, I followed my own method the 13 way. His advice did not improve my writing but our 14 . As I grew older, I found out that he had finished his 15 in Grade 6, which was the highest grade in town then, so he was considered to be a 16 . People used to ask him to write something to put on the walls, but he never felt very useful. He often said to me, "As you can see, this family is going to depend on you. We are 17 to improve you anything for your future .You have to get 18 to change the life for yourself." As a result of his 19 , I have 20 it through high school and through college. | ||||
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一女性患者有心脏病史10余年，近因左侧 * * 无痛性肿块来院就诊，检查发现肿块边界不清，活动度差，皮肤轻度内陷，同侧腋下淋巴结肿大。X线检查发现患侧 * * 有边界不规则的肿块阴影。应选用下列何种药物治疗（）
A.6-巯基嘌呤
B.阿糖胞苷
C.5-氟脲嘧啶
D.阿霉素
E.白消安
效力未定民事行为的类型包括（）。
A.限制民事行为能力人订立的其依法不能独立订立的合同
B.无权代理人和表见代理人所订立的合同
C.法定代表人、负责人超越权限订立的合同
D.无处分权人处分他人财产所订立的合同
E.损害社会公共利益的合同
绿脓杆菌感染
影响作物灌溉制度的因素有作物种类、品种，自然条件，农业技术措施。
