在细胞分裂中期阻断有丝分裂的药物为（） A.甲氨蝶呤 B.环己亚硝脲 C.长

什么叫早吸吮？分娩后应怎样进行母婴接触？

A、B两种固体物质（均不含结晶水）溶解度如图所示．

①t₁℃时，A和B的溶解度大小关系是A        B（填“＞”、“=”或“＜”）．

②t₁℃时，将4.2g  A物质溶于20g水中，刚好形成饱和溶液，t₁℃时，A物质的溶解度为        g/100g水，A的饱和溶液转化处不饱和溶液的方法是                  ．（写一条）

③t₂℃时，B物质的溶解度为25g/100g水，在t₂℃时，向50g水中加入15g的B物质，充分溶解所得溶液的溶质质量分数为                  ．

④如A和B中有一种物质是氯化钠，你认为是A还是B        （填A或B），一般通过海水晒盐的方法从海水中获得氯化钠晶体，原因是                             ．

二大机构五大系统是什么？

EDTA对金属离子的络合能力随酸度的不同而不同，酸度越低，络合能力越强

Microsoft’s COM is a software (146) that allows applications to be built from binary software components. COM is the underlying architecture that forms the foundation for higher-level software services, like those provided by OLE. COM defines a binary standard for function calling between components, a way for components to dynamically discover the interfaces implemented by other components, and a mechanism to identify components and their interfaces uniquely.

OLE is a compound (147) standard developed by Microsoft. OLE makes it possible to create (148) with one application and link or embed them in a second application. Embedded objects retain their original format and (149) to the application that created them. Support for OLE is built into the Windows and MacOS Operating Systems. A (150) compound document standard developed mainly by Apple and IBM is called OpenDoc.

（146）是（）

A.architecture

B.protocol

C.procedure

D.structure