伴随着项目的实施，需要紧密地监控项目的发展，确保每一阶段的结果都符合最初设定的质量标

不论x为何值,函数y=ax²+bx+c(a≠0)的值恒大于0的条件是(   )

A．a>0,△>0;

B．a>0, △<0;

C．a<0, △<0;

D．a<0, △<0

What is the definition of a Path ( )

A．a sequence of vertices and the edges formed by each successive pair of vertices

B．a walk with distinct edges

C．a walk with distinct vertices

D．none of the above

The mother of a child with flat feet asks the nurse why her child needs to wear corrective shoes. Which of the following is the most appropriate reason that the child needs to wear corrective shoes

A．Preventing the development of internal tibial torsion.

B．Strengthening the arches of the feet.

C．Keeping the legs in proper alignment.

D．Delaying the development of femoral anteversion.

对咽部的描述，正确的是（）。

A.咽是呼吸道和消化道上端的共同通道

B.咽上起颅底，下至第七颈椎

C.前面与鼻腔、口腔及喉相通

D.后壁与椎前筋膜相邻

E.两侧与大血管及神经比邻

李密的《陈情表》以其质朴感人的艺术魅力，入选我国第一部文学作品总集《昭明文选》，且有人将此文与诸葛亮的《出师表》并称为天地间难得之至诚文字