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完形填空。 A little boy invited his mother to attend his school's first parent meeting. To the little boy's 1 , she said she would go. This would be the first time that his classmates and teacher 2 his mother. And he felt 3 for her look. Although she was a beautiful woman, there was a serious scar (疤痕) that 4 nearly all the right side of her face. The boy never wanted to 5 why or how she got the scar. At the meeting, the people were 6 by the kindness and natural beauty of his mother although there was the scar on her face. But the little boy was still unhappy and 7 himself from everyone. However, he could 8 the conversation between his mother and his teacher. The teacher asked 9 , 'How did you get the scar on your face?' The mother replied, 'When my son was a baby, he was in a room that 10 fire. I tried my best to take him to safety, but I was hurt in the face. All the people were moved, especially the boy. (     )1.A. enjoyment (     )2.A. noticed (     )3.A. sorry (     )4.A. included (     )5.A. talK about (     )6.A. angry (     )7.A. hid (     )8.A. understand (     )9.A. carefully (     )10.A. made B. disappointment B. greeted B. happy B. passed B. think about B. surprised B. protected B. remind B. seriously B. caught C. surprise C. met C. worried C. covered C. hear about C. comforted C. sat C. hear C. happily C. set
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【多选题】下列选项有关发动机总体构造说法正确的是()。
A.
曲柄连杆机构将燃料燃烧时产生的热量转变为活塞往复运动的机械能,
B.
废弃机构使可燃混合气或新鲜气体适时地充入气缸,
C.
燃料供给系需要根据发动机工作的要求,定时定量定压的提供最佳浓度的可燃混合气,
D.
润滑剂不仅减少机械之间的摩擦,还可以起到冷却的作用,
E.
冷却剂是保证发动机正常工作温度的主要机构
【单选题】出口用瓦楞纸的形状通常选用( )
A.
U
B.
V
C.
UV
D.
VV
【单选题】以下是汽车发动机曲柄连杆机构的作用的是( )。
A.
将燃料然烧烧时产生的热量转变为活塞往复运动的机械能,再通过连杆将活塞的往复运动变为曲轴的旋转运动而对外输出动力。
B.
机械能转变为活塞往复运动的热能,再通过连杆将活塞的往复运动变为曲轴的旋转运动而对外输出动力。
C.
将燃料燃烧时产生的热能转变为活塞往复运动的机械能,再通过连杆将活塞的旋转运动变为曲轴的往复运动而对外输出动力。
D.
连杆将活塞的往复运动变为曲轴的旋转运动而对外输出动力。
【判断题】进行捆绑销售是提高商品价格的有效方法。
A.
正确
B.
错误
【判断题】内燃机的曲柄连杆机构的作用是将燃料燃烧时产生的热能转变为机械能。
A.
正确
B.
错误
【简答题】曲柄连杆机构的作用是将燃料燃烧时产生的( )转变为活塞往复运动的( ),再通过连杆将活塞的( )变为曲轴的( )而对外输出动力。
【单选题】患者男,60岁,连续应用抗生素达2个月。其口腔黏膜的创面病原可考虑为
A.
病毒感染
B.
真菌感染
C.
口腔白斑
D.
口腔寄生虫感染
E.
口腔铜绿假单胞菌感染
【多选题】发动机曲柄连杆机构的作用是()
A.
定时开开闭进排气门
B.
将燃料燃烧时产生的热能转变为活塞往复运动的机械能
C.
通过连杆将活塞的往复运动变为曲轴的旋转运动而对外输出动力
D.
通过飞轮旋转完成做功行程
【单选题】合作伙伴选择的一般性原则,不包括( )。
A.
核心能力原则
B.
总成本核算原则
C.
灵敏性原则
D.
风险最大化原则
【判断题】衣原体没有细胞壁,能通过细菌滤器,能够在无生命培养基上繁殖。
A.
正确
B.
错误
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