In the first example, the pile of books on the table-cloth will ______

A．be broken into pieces

B．scatter onto the ground

C．remain in its position of rest

D．be wrapped in the table-cloth

X线胸片诊断慢性肺源性心脏病的主要依据，下列哪项不符合（）

A.可有明显肺气肿或慢性肺部感染疾患征象

B.右心室扩大

C.肺动脉段突出，其高度≥5mm

D.右下肺动脉干横径≥1.5mm

E.右下肺动脉干横径与气管横径之比≥1.07