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【简答题】
已知各项均不相等的等差数列{ a n }的前四项和 S 4 =14,且 a 1 , a 3 , a 7 成等比数列. (1)求数列{ a n }的通项公式; (2)设 T n 为数列{ }的前 n 项和,若 T n ≤ λa n + 1 对? n ∈ N * 恒成立,求实数 λ 的最小值.
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【多选题】请问下面哪两部作品不是鲁迅的?
A.
背影
B.
一件小事
C.
狂人日记
D.
【单选题】For monocoque construction the () carries the primary stresses.
A.
skin
B.
bulkhead
C.
frame
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A.
longerons
B.
skins
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stringers
D.
bulkheads
【单选题】患者,女性, 52岁。门诊以右侧乳腺癌收入院。护士查体发现患者右乳房皮肤有橘皮样改变。乳腺癌根治术后,出院时护士对其进行健康教育,关于乳房自查适宜时间,正确的是( )
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月经前3d
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月经前ld
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月经期间
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月经干净后l~2周
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月经周期第7~10天
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淬硬钢球
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金刚石锥体
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硬质合金球
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boost production of grain
B.
construct first-rate transportation system
C.
turn out sophisticated weapons used for mass killing in war
D.
turn desert into fertile land
【单选题】In monocoque fuselages, the ______must carry the primary stresses and keep the fuselage rigid.
A.
longeron
B.
skin
C.
stringer
D.
bulkhead
【单选题】To overcome the strength/weight problem of monocoque construction, ________ was developed
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monocoque
B.
semi-monocoque
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reinforced shell
【单选题】China′s building firms are ()to expand their business abroad, learn the local construction practices and provide their excellent services.
A.
doing efforts
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efforts
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doing effect
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effect
【单选题】下列关于“对话框”的说法中,错误的是( )。
A.
“对话框”中可能出现多个选项卡
B.
“对话框”与窗口相同,可以改变大小
C.
“对话框”没有最大化、最小化按钮,可以移动位置
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“对话框”有标题栏、关闭按钮,有时也会出现菜单栏
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