下列实验基本操作中,不正确的是 [ ] A. B. C. D.

题型:选择题

问题:

下列实验基本操作中,不正确的是 [ ]

A.

B.

C.

D.

考点:化学实验操作的注意事项
题型:选择题

如图所示,长为L的直棒一端可绕固定轴O转动,另一端搁在升降平台上,平台以速度v匀速上升,当棒与竖直方向的夹角为α时,棒的角速度为(  )

A.

vsinα
L

B.

v
Lsinα

C.

vcosα
L

D.

v
Lcosα

题型:选择题

CTCS2-200H型列控系统“记录单元”的英文缩写是()。

A、VC

B、BTM

C、TIU

D、DRU

题型:选择题

肺表面活性物质的主要作用包括()。

A.降低肺泡表面张力

B.稳定肺泡容积

C.加速肺液清除

D.维持肺泡-毛细血管间正常流体静压

E.减低毛细血管前血管张力

题型:选择题

客户使用飞信业务需申请开通。客户可通过PC客户端、()、STK卡、()、()、()、()、10086等多种方式开通或者取消业务功能。

题型:选择题

An application architecture specifies the technologies to be used to implement one or more information systems. It serves as an outline for detailed design, construction, and implementation. Given the models and details, include (1), we can distribute data and processes to create a general design of application architecture. The design will normally be constrained by architecture standards, project objectives, and (2). The first physical DFD to be drawn is the (3). The next step is to distribute data stores to different processors. Data(4) are two types of distributed data which most RDBMSs support. There are many distribution options used in data distribution. In the case of (5)we should record each table as a data store on the physical DFD and connect each to the appropriate server.

(4)是()

A. vertical partitioning and horizontal replication

B. vertical replication and horizontal partitioning

C. integration and distribution

D. partitioning and replication

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