下列哪项是新生儿窒息的临床表现A.胎儿缺氧早期为胎心减慢，胎动减少B.窒息分轻、中、重三度

未知题型

Extract 1
A stylish dining room with cream walls and curtains and black carpet as perfect foil to an eclectic array of furniturE.Many of the pieces are classics of their particular era, and demonstrate how old and new designs can be happily mixed together. The prototype chair in the foreground has yet to prove its staying power and was thought up by the flat's occupant. He is pictured in his living room which has the same decorative theme and is linked to the dining room by a high Medieval-styled archway where was once a redundant and uninspiring fireplacE.
Extract 2
Old bathrooms often contain a great deal of ugly pipework in need of disguising. This can either be done by boxing in the exposed pipes, or by fitting wood paneling over them.
As wood paneling can be secured over almost anything — including old ceramic tiles and chipped walls — is an effective way of disguising pipework as well as being an attractive form. of decoration. The paneling can be vertical, horizontal or diagonal.
An alternative way to approach the problem of exposed pipes is to actually make them a feature of the room by picking the pipework out in bright strong colours.
Extract 3
Cooking takes second place in this charming room which; with its deep armchairs, is more of a sitting room than a kitchen, and the new Rayburn stove as a good Choice, as it blends in well with the old brick and beamed fireplacE.There are no fitted units or built-in appliances, so all food preparation is done at the big farmhouse table in the foreground; and the china, pots and pans have been deliberately left on show to make an attractive display, What about the kitchen sink? It's hidden away behind an archway which leads into a small scullery. Here there's a second cooker and — in the best farmhouse tradition — a huge walk-in larder for all food storagE.
Why is the colour of the carpet described in Extract 1 a particular advantage?
A.It livens up the colour in an otherwise dull room.
B.It provides a contrast to the furniturE.
C.It blends in with the tones of the furniturE.
D.It gives the room a classical stylE.

单项选择题

从病原体侵入人体至开始出现临床症状的时期称为

A.潜伏期
B.前驱期
C.症状明显期
D.恢复期
E.复发

未知题型

阅读以下文字，完成以下问题。
一项新的研究显示，科学家最近找到了造成老化的原因，原来是决定性别的两枚染色体中的X染色体作祟所致。
比利时科学家在最近出版的英国医学周刊《柳叶刀》上表示，他们从比利时北部弗兰德斯数百名志愿者体内取出白血球，检查其中染色体端粒的长度，结果发现，受试者父女、母子、母女与其他兄弟姐妹彼此间的端粒长度大致相同，而父子或者配偶之间的染色体端粒长度则有别。
研究人员说，这显示遗传因素，具体而言，就是X染色体发挥了影响力。女性拥有两个X染色体，都来自双亲，男性则拥有一个遗传自母亲的X染色体，以及遗传自父亲的Y染色体。
负责这项研究、目前任敦鲁汶大学的史泰森说：“我们的观察结果是，老化的过程可能与X染色体有关。”他[ ]还需要作更多的研究才能证实这点，但是目前已看得出X染色体中两个有意思的基因，可能影响端粒缩短的速度。其中之一是对稳定端粒非常重要的一种蛋白厨基.KCI。
另一个基因是在分泌抑制细胞老化的化学物质氧化氮过程中扮演要角的AGTR2。此外，同龄男女比对结果显示，女性的端粒较男性长，这说明了何以一般而言女性比男性长寿。研究报告作者推断，雌激素能够刺激端粒，因此可能是重要的影响因素。
医界早在3年前就发现端粒可能是造成老化的因素。最近美国科学家更声称他们可利用储存的血样，预先推断某人60岁以后的健康情形。端粒较短者日后出现老化有关疾病的概率较高，75岁以前因肺炎与心脏病去世的概率，也较常人高出1倍。不过除了端粒的影响，环境与生活方式，例如吸烟、酗酒、运动、压力大等，也是影响老化的重要因素。
关于老化的原因解说不正确的一项是( )。
A.老化可能与决定性别X染色体有关
B.老化可能与端粒缩短速度有关
C.老化与雌激素无关
D.老化与生活方式有关

下列哪项是新生儿窒息的临床表现

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