应用最广泛的叉车是（　）。

[问答题]Despite the basic biological, chemical, and physical similarities found in all living things, a diversity of life exists not only among and between species but also within every natural population. The phenomenon of diversity has had a long history of study because so many of the variations that exist in nature are visible to the eye.　　1) It has been suggested that sexual reproduction became the dominant type of reproduction among organisms because of its inherent advantage of variability, which is the mechanism that enables a species to adjust to changing conditions.New variations are potentially present in genetic differences, but how preponderant a variation becomes in a gene pool depends upon the number of offspring the mutants or variants produce (differential reproduction). 2)It is possible for a genetic novelty (new variation) to spread in time to all members of a population, especially if the novelty enhances the population’s chances for survival in the environment in which it exists.Thus, when a species is introduced into a new habitat, it either adapts to the change by natural selection or by some other evolutionary mechanism or else it eventually dies off. Because each new habitat means new adaptations, habitat changes have been responsible for the millions of different kinds of species and for the heterogeneity within each species.　　The total number of animal and plant species is estimated at between 2,000,000 and 4,500,000; authoritative estimates of the number of extinct species range from 15,000,000 up to 16,000,000,000. 3)Although the use of classification as a means of producing some kind of order out of this staggering number of different types of organisms appears as early as the book of Genesis—with references to cattle, beasts, fowl, creeping things, trees, etc.—the first scientific attempt at classification is attributed to the Greek philosopher Aristotle, who tried to establish a system that would indicate the relationship of all things to each other.He arranged everything along a scale, or “ladder of nature”, with nonliving things at the bottom; plants were placed below animals, and man was at the top. 4)Other schemes that have been used for grouping species include large anatomical similarities, such as wings or fins, which indicate a natural relationship, and also similarities in reproductive structures.　　5)At the present time taxonomy is based on two major assumptions: one is that similar body construction can be used as a criterion for a classification grouping; the other is that, in addition to structural similarities, evolutionary and molecular relationships between organisms can be used as a means for determining classification.

[单选题]Ⅱ度冻疮是（）

[判断题]凡是商标均可以转让。

[单选题]胆囊炎患者，应给予（）

[判断题]农村农业劳动者的劳动关系，属于我国《劳动法》调整劳动关系的范围。

[单选题]用直接玻棒法检测精液黏稠度，正常精液黏丝长度（）

[判断题]被保险存款包括投保机构吸收的人民币存款和外汇存款

[单选题]普法战争是由下面哪一个国家发动的（）

[多选题]饭店进行收益管理的策略有（）

[判断题]食品添加剂是食品生产、加工中必不可少的。

[填空题]叉车的分类：（）、（）、前移式叉车、插脚式叉车、跨车以及其他类型叉车。

[问答题]平衡重式叉车、插腿式叉车、前移式叉车各自的特点及使用条件？

[判断题]叉车在使用了叉车属具后可以提高叉车的额定起重量。

[问答题]平衡重式叉车、插腿式叉车、前移式叉车各自的特点及使用条件？

[填空题]叉车的（）是叉车的重量数。

[单选题]叉车的车架是叉车的（）

[判断题]叉车分蓄电池叉车和内燃叉车。

[填空题]根据叉车货叉位置的不同可分类为（）叉车和（）叉车。

[问答题]叉车的主要参数有哪些？平衡重叉车、前移式叉车、侧面式叉车如何保持工作时的稳定性？

[问答题]叉车的主要参数有哪些？平衡重叉车、前移式叉车、侧面式叉车如何保持工作时的稳定性？