试述儿童消化酶分泌和成熟的特点？

通过刮削，能使工件（）

A.表面光洁

B.接触精度较高

C.表面粗糙度值增大

D.表面粗糙度值减小

Why is（）fun What delights may its practitioner expect as his reward First is the sheer joy of making things. As the child delights in his mud pie, so the adult enjoys building things, especially things of his own design. Second is the pleasure of making things that are useful to other people. Third is the fascination of fashioning complex puzzle-like objects of interlocking moving parts and watching them work in subtle cycles, playing out the consequences of principles built in from the beginning. Fourth is the joy of always learning, which springs from the（）nature of the task. In one way or another the problem is ever new, and its solver learns something: sometimes （）, sometimes theoretical, and sometimes both. Finally, there is the delight of working in such a tractable medium. The（）, like the poet, works only slightly removed from pure thought-stuff. Few media of creation are so flexible, so easy to polish and rework, so readily capable of realizing grand conceptual structures. Yet the program（）, unlike the poet’s words, is real in the sense that it moves and works, producing visible outputs separate from the construct itself. It prints results, draws pictures, produces sounds, moves arms. Programming then is fun because it gratifies creative longings built deep within us and delights sensibilities we have in common with all men.

Why is（）fun What delights may its practitioner expect as his reward First is the sheer joy of making things.

A．programming

B．composing

C．working

D．writing

患儿女，6岁，因“间断发热伴咳嗽迁延不愈和口腔白色膜状物5个月”来诊。病后精神尚可，食欲欠佳，排尿、排粪如常，体重有所下降，偶有双膝关节疼痛。1岁时因“体质差”输全血100ml。患病前5个月，曾患“川崎病”。查体：T38.5℃；体重16kg；口腔黏膜见多处白色膜状物，双侧扁桃体Ⅰ度肿大，充血；浅表淋巴结无肿大；双下肺细湿性啰音；肝肋下2cm，质中，脾未及；双膝及其他关节无红、肿、热、痛与变形。

为明确诊断应进行的检查项目包括（）

A.血常规

B.PPD试验

C.风湿病自身抗体

D.抗HIV抗体

E.抗HCV抗体

F.外周血淋巴细胞亚群

G.骨髓活检

下列设备不属于分选设备的是（）。

A.粗粉分离器

B.V型选粉机

C.高效双分离选粉机

D.旋风筒

评价领导干部的经济责任，应通过（）等步骤。

A.界定领导干部的经济职权；

B.确定经济职权范围内的经济事项和经济数据；

C.界定领导干部在各个经济事项中经济行为的主次；

D.评判领导干部在各个经济事项中履行职责的等次；