DL/T1115-2009适用范围？

根据《合同法》，应当采用书面形式的合同是（）。

A．设备租赁合同

B．建设工程合同

C．承揽合同

D．货物买卖合同

Now let's look ourselves as a species in relation to ecosystem balance.Modern scientists believe that humankind, like other animals, evolved(进化) through millions of years of changes and adaptations to the environment and that our most direct evolutionary ancestor was probably an earlier species of the primate(monkey, ape) group. Despite this similarity with other creatures, however, the evolution of humankind differs from that of other species in one important and unique way.

In other species, evolution has led to specialization, both in the species abilities and in its place within the environmental structure. For example, the giraffe is much adapted to feeding on treetops, but it is also specialized and thus limited to feeding on trees and shrubs. Only with great difficulty can it bend down to graze on the ground. Similarly, the anteater is extremely well adapted to eating ants but is unable to catch or eat other animals. The same is true for countless other species.

For humankind it is opposite. Our evolution had led to a very generalized ability. Our highly developed intelligence and ability to make and handle tools mean that we can do almost anything. Humans evolved in such a way that we are able to move into every environment on Earth and even into space. No natural competitor offers great resistance, and other natural enemies such as disease have been controlled.

Said another way, we see in humankind a great imbalance between biological potential and environmental resistance. The result is the rapidly increasing world population, frequently referred to as the population explosion. Further, to support our growing population, natural ecosystems are being increasingly displaced by human habitations, agriculture, and other human supporting activities.

小题1:From the passage we can infer that in the course of evolution _______.

A．humankind is very important to earlier species, such as the primate group

B．human beings are limited by the environment while animals are not

C．human beings become more and more different from each other

D．humankind has experienced a generalization rather than specialization in ability小题2:According to the passage, primate includes such animals as _______.

A．monkeys and anteaters

B．tigers and apes

C．apes and monkeys

D．monkeys and giraffes小题3:According to the passage, evolution has made it possible for humans to _______.

A．increase the population

B．resist natural offers

C．go to the moon

D．cure all diseases小题4:According to the author, imbalance between biological potential and environ mental resistance has resulted in _______.

A．the population explosion

B．the destruction of human habitations

C．the growth of natural ecosystem

D．the specialization of humans

已知C₃N₄晶体具有比金刚石还大的硬度，且构成该晶体的微粒间只以单键结合。下列关于C₃N₄晶体的说法错误的是[ ]

A．该晶体属于原子晶体，其化学键比金刚石中的碳碳键更牢固

B．该晶体中每个碳原子连接4个氮原子、每个氮原子连接3个碳原子

C．该晶体中碳原子和氮原子的最外层都满足8电子结构

D．该晶体与金刚石相似，都是原子间以非极性键形成空间网状结构

日曜日のつぎの日は（）です。

A.水曜日

B.月曜日

C.土曜日

D.火曜日

1．某工程楼面如图3.1“楼层平面结构图”所示。梁纵向钢筋通长布置，8m长一个搭接，搭接长度1.2L_t，L_t为40d。梁箍筋弯钩长度每边10d。梁混凝土保护层25mm。

2．该工程分部分项工程量清单项目综合单价的费率：管理费率12%，利润率7%。其他相关资料见答题纸表3。2“分部分项工程量清单计价表”(管理费、利润均以人工费、材料费、机械费之和为基数计取)。

1．计算KL1梁钢筋的重量，井将相关内容填人答题纸表3。广钢筋计算表”相应栏目中。

2．依据《建设工程工程量清单计价规范》，将项目编码、综合单价、合价及综合单价计算过程填人答题纸表3.2“分部分项工程量清单计价表”的相应栏目中。

(注：计算结果均保留两位小数)