试述妊娠用药禁忌的一般原则。

水泥抗折强度试验加荷速率为（）。

下图表示某生态系统生物部分各组成成分相互依存关系图，请回答以下问题。

(1)图中的分解者是      _。

(2)根据吃与被吃的关系，图中有__     __条食物链。

西安半坡遗址是新石器时代仰韶文化的典型，以红质黑纹的彩陶为特征。其后的龙山文化，则以坚硬的黑陶为特征。半坡彩陶上每每有一些类似文字的简单刻画，和器物上花纹判然不同。黑陶上也有这种刻画，但为数不多。刻画的意义至今虽尚未阐明，但无疑是具有文字性质的符号，如花押或者族徽之类。我国后来的陶器、铜器或者其他器物，有“物勒工名”的传统。殷代的青铜上就有一些表示族徽的刻画文字，和这些符号极相似。由后比例前，也就如由黄河下游以溯源于星宿海，彩陶上的那些刻画记号，可以肯定地说就是中国文字的起源，或者中国原始文字的孑遗。

彩陶上的花纹。有些如人形、人面形、人着长衫形、鸟形、兽形、草木形等等，画得精巧，得心应手，看来显然在使用着柔软性的笔了。有人以为这些绘画是当时的象形文字，其说不可靠。当时是应该有象形文字的，但这些图形，就其部分而言，确是花纹，而不是文字。

在陶器上既有类似文字的刻画，又有使用着颜料和柔软性的笔所绘画的花纹，不可能否认在别的质地上，如竹木之类，已经在用笔来书写初步的文字：只是这种质地是容易毁灭的，在今天很难有实物保留下来。

作者推断“当时是应该有象形文字的”的依据，正确的是（）。

A．写在竹木上的文字质地容易毁灭，难以保留至今

B．半坡彩陶上的花纹形式多样，都有别于刻画的绘画

C．半坡彩陶上已出现了具有文字性质的简单的刻画

D．半坡彩陶上的人和物的形状，已初具象形文字特点

如图所示，某矿井工人用200 N的水平拉力抓紧绳子的一端，沿水平地面匀速向右运动，在10 s内将矿井里质量为32 kg的物体提升4m。根据题给条件，请你设计并计算出与本题有关的5个物理量，要求写出简要说明和结果。（g取10 N/kg）

 

It is clear that we are rapidly becoming a global culture. New forms of information technology, intercontinental travel, and the complex nature of economics are all elements in such a change. Japan, an ancient (1) culture, now dominates the West economically while its own traditional (2) is rapidly becoming (3) in the process.
It does not take a great deal of analysis to see the vast interchanges of cultural influences in the world today. The thirst for (4) fashions, popular music, and the other elements of consumer culture (5) great inroads in non-Western lands while the West seeks out everything from the religious traditions of the Ease (6) the art and music these countries produce. In the field of (7) , to cite one conspicuous example, contemporary readers seek books (8) those of the West. Latin American authors, as well as those from Africa, Asia, and India, now find appreciative audiences.
A (9) culture does not mean a unitary or "one world" culture. It does mean that people are increasingly aware of the diversity of culture. World events enter our living rooms so that things that may once have been (10) of as distant (11) now greet us immediately and in color. We may watch those events on a television made in Japan while wearing clothes sewn in Thailand and shoes made in Hungary while snacking (12) food grown in Mexico. Such an economic interdependence reflects the reality of a global banking system, the globalization of the economy, and the increasing (13) of information and information technologies.
(14) has this shrinking of distances (and attitudes) become more clear than in the academic debates over what constitutes a liberal (15) education today. Is it possible (or desirable) to have the Western core of humanities (16) the center-piece of a curriculum The place of non-Western and non-traditional cultures as part of the general (17) of a student is hotly argued in educational circles. The very fact of that discussion (18) to the emergence of a global consciousness with a continued shrinking of parochial attitudes. The (19) that such globalization is hotly debated only emphasizes the profound nature of the (20) taking place in our culture.