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【单选题】
听力原文: New England is an area of mountains, valleys, and rivers. It is said that in New England one is always climbing hills. A large part of New England is also made up of farms and farming lands. Yet New England is not really a fanning area. The farms are small. Generally they are only large enough to support one family. It also happens that the soil of New England is riot good. This soil has been worked and planted for se many years that it has lost its value. Most New Englanders today work in factories or small businesses. In these factories they make watches and clocks, shoes, clothing, special tools for industry, leather goods, etc. New England workmen are famous for their skill in making many of these things. This skill is often passed down in families from father to son. (33)
A.
It is completely flat.
B.
It has few rivers.
C.
It has many large lakes.
D.
It is hilly.
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【单选题】关于木材力学性能的结论,错误的是:
A.
顺纹抗压强度较高,为 30MPa-70MPa
B.
顺纹抗拉强度最高,能达到顺纹抗压强度的三倍
C.
抗弯强度可达到顺纹抗压强度的二倍
D.
顺纹剪切强度相当于顺纹抗压强度
【单选题】人造地球卫星绕地球做椭圆轨道运动,卫星轨道近地点和远地点分别为A和B,若用L和 分别表示卫星对地心的角动量和动能,则( )
A.
;
B.
;
C.
;
D.
【单选题】楼面或地面结构层上表面至上部结构层上表面之间的垂直距离是指( )
A.
建筑空间
B.
自然层
C.
结构层高
D.
架空层
【单选题】安全性高、收益稳定、目前是我国家庭重要理财方式的是( )
A.
储蓄
B.
债券
C.
股票
D.
商业保险
【单选题】安全性高、收益稳定、目前是我国家庭重要理财方式的是
A.
债券
B.
商业保险
C.
股票
D.
储蓄
【单选题】在酒桌上要始终贯穿一个什么字
A.
B.
C.
D.
【单选题】人造卫星绕地球作椭圆轨道运动,卫星轨道近地点和远地点分别为 A 和 B ,用 L 和 E k 分别表示卫星对地心的角动量及其动能的瞬时值,则应有( )。
A.
L A >L B , E KA >E KB
B.
L A =L B , E KA < E KB
C.
L A = L B , E KA > E KB
D.
L A < L B , E KA < E KB
【单选题】人造地球卫星绕地球做椭圆轨道运动,选地心为参考点,则( )
A.
卫星在近地点和远地点的角动量相同,速率相同
B.
卫星在近地点和远地点的角动量相同,速率不同
C.
卫星在近地点和远地点的角动量不同,速率相同
D.
卫星在近地点和远地点的角动量不同,速率不同
【单选题】关于木材力学性能的结论,错误的是:
A.
顺纹抗压强度较高,为30?70MPa
B.
顺纹抗拉强度最高,能达到顺纹抗压强度的3倍
C.
抗弯强度可达到顺纹抗压强度的2倍
D.
顺纹剪切强度相当于顺纹抗压强度
【判断题】浇口的数量越多越好,因为这样可使熔体很快充满型腔。
A.
正确
B.
错误
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