The field was used by horses from the riding school that is _____ the farm.

A.db

B.dbm

C.dbd

D.dbi

e.” ()

A.Document type

B.Item category

C.Release status

D.Activity category

A.网上信息 Online information

B.统计年鉴 Statistical yearbook

C.年度报告 Annual report

D.生产车间现场测试 Field test at production workshop

eld is used aboard as a

A.magnetic amplifier

B.ship's service alternator

C.three-wire DC generator

D.saturable core reactor

A、In terms of the concepts and categories used, a system of educational concepts, categories and concepts has been formed which specifically reflect the essence and law of education

B、There are mainly: the object of study, education has become a special research field

C、In terms of research methods, there is a scientifi'" research method

D、In terms of research results, some seialiedd and systematic works on pedagogy have appeared

al credentials are indisputable. It grows better in organic systems than in conventional ones. It smothers weeds and controls pests, clearing the land for other crops. It improves the structure of the soil, with strong roots to prevent erosion. If processed in the field, it returns nutrients to the land and purports to ,clean up？ soil contaminated with heavy metals. It is one of a minority of textile-fibre crops that can be grown in temperate climates. So why, given its potential, is so little hemp used today？ (New Internationalist, June 1998, p. 14)

A、simple linear progression

B、split progression

C、constant progression

D、derived hyperthematic progression

A．It suggests a need to discard methods used in earlier experiments

B．It tends to weaken the assumptions on which earlier experiments were designe

C．It suggests that the problem revealed in earlier experiments may be more widespread than previously thought

D．It helps to explain a phenomenon revealed in earlier experiments

A. it is a layer 2 messaging protocol which maintains vlan configurations across network.

B. it includes an 8-bit field which specifies the priority of a frame.

C. it is used exclusively for tagging vlan frames and dose not address network reconvergence following switched network topology changes.

D. it modifies the 802.3 frame header,and thus requires that the FCS be recomputed.

E. it is a trunking protocol capable of carring untagged frames.

A.理论上明视场和暗视场都可作为初始值，但用暗场更易区分 Theoretically, both the bright and the dark fields can be used as the initial values, but the dark field is easier to distinguish#B.目镜、玻璃管和气泡都影响视场 Eyepiece, glass tube and bubble all affect the field of view#C.旋光计最小刻度是0.01° The minimum scale of polarimeter is 0.01 degree#D.葡糖糖溶液的旋光度与光路长度和浓度都有关系 The optical rotation of glucose solution is related to the length of optical path and the concentrati