患者，女性，30岁，颈前肿块多年。近1个月来，肿块生长迅速，并出现声音嘶哑，颈前可触

抛物线4x = y²的准线方程为                  .

某患者因从马车上掉下，头后枕部着地，颈部活动受限，下颈椎压痛明显，四肢弛缓性瘫，躯干感觉平面在胸骨柄以下，痛、温觉消失，不能自行排尿，诊断首先考虑（）

A．颈椎间盘突出症

B．颈椎骨折脱位并颈髓损伤

C．颈部软组织损伤

D．颈椎骨折脱位并臂丛神经与腰骶丛神经损伤

E．胸椎骨折并脊髓损伤

钻井液的PV越低，YP越大，剪切稀释能力（）。

A、强

B、弱

C、不变

D、都行

椒疮病位于（）

A.上睑皮肤面

B.下睑皮肤面

C.上睑内面

D.下睑内面

E.睑缘

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 attractable 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．

A．repeating
B．basic
C．non－repeating
D．advance