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【简答题】
阅读理解。 How important is your appearance? Although everyone wants to be good-looking, are beautiful people always happier people? For example, it must be a problem to be a really beautiful woman, because some people may be more interested in looking at you than talking to you. They think of you as a picture rather than a person. There are also some people who think that women who are exceptionally (格外地) pretty and men who are particularly handsome must be stupid. They believe that only unattractive (无魅力的) people can be intelligent. On the other hand, no one wants to be really ugly, and have a face that even your mother doesn't want to look at; and no one wants to be plain, either-that is, to be neither attractive nor unattractive, and have a face that is easily forgotten. Being attractive is like being rich-it can help you find happiness, but it doesn't always make you happy. So maybe the best thing is not to worry too much about how you look, but simply try to be an interesting person. For interesting people have interesting faces, and interesting faces are almost always attractive. 根据短文内容,判断正(T),误(F)。 (     )1. Everyone wants to be attractive. (     )2. No one likes to talk to a very pretty woman. (     )3. Some people think that handsome men are uninteresting. (     )4. A plain face is easily forgotten. (     )5. Not many interesting people are also attractive.
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举一反三
【单选题】不属于腺垂体激素的是
A.
生长激素
B.
促卵泡素
C.
促黄体素
D.
促乳素
E.
促性腺激素释放激素
【单选题】腺垂体释放的促性腺激素是( )
A.
FSH和LH
B.
雌激素和孕激素
C.
雌激素与FSH
D.
睾酮
E.
孕激素与LH
【单选题】促性腺激素释放激素、促甲状腺激素释放激素、促肾上腺激素释放激素所作用的器官分别是 [     ]
A.
性腺、甲状腺、肾上腺
B.
垂体、甲状腺、肾上腺
C.
垂体、垂体、垂体
D.
垂体、垂体、肾上腺
【简答题】圆柱螺旋弹簧的弹簧丝直径d=6mm,旋绕比C=5,则它的内径D 1 等于()。
【单选题】作用于内分泌腺的腺垂体激素是
A.
生长素
B.
催乳素
C.
促甲状腺素释放激素
D.
促性腺激素释放激素
E.
催产素
【简答题】某发动机排气阀的密圈圆柱螺旋弹簧,其平均直径D=60mm,圈数n=10,簧丝直径d=6mm。弹簧材料的σ b =1300MPa,τ b =800MPa,τ s =500MPa,τ -1 =300MPa,G=80GPa。弹簧在预压缩量λ 1 =40mm和最大压缩量λ max =90mm范围内工作。若取β=1,试求弹簧的工作安全因数。
【简答题】受压圆柱形密圈螺旋弹簧簧丝的直径d=6mm,弹簧的平均直径D=12cm,有效圈数n=18,G=80GPa。若使弹簧压缩2.5cm,试求所需施加的静载荷。又若以这一载荷自10cm的高度落于弹簧上,则弹簧的最大应力及变形各为多少?
【单选题】腺垂体释放的促性腺激素是
A.
促卵泡激素与黄体生成素
B.
雌激素与孕激素
C.
睾酮
D.
孕激素与黄体生成素
【单选题】促性腺激素释放激素兴奋试验是检测
A.
下丘脑促性腺激素释放激素的储备能力
B.
腺垂体促性腺激素的储备能力
C.
卵巢和睾丸的性激素储备能力
D.
下丘脑对性激素负反馈作用的反应能力
E.
腺垂体对性激素负反馈作用的反应能力
【单选题】促性腺激素释放激素、促甲状腺激素释放激素、促肾上腺激素所作用的器官分别是 [     ]
A.
性腺、甲状腺、肾上腺
B.
垂体、甲状腺、肾上腺
C.
垂体、垂体、垂体
D.
垂体、垂体、肾上腺
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