在病理状态下才显示于X线平片上的是（）
A.骨皮质
B.骨灰质
C.骨髓腔
D.骨膜
E.血管滋养孔
参考答案：D
The MH370 incident has cast a giant shadow over travel to Malaysia for many Chinese. Another large travel agency, China International Travel Service Head Office, has seen a ____ drop in consumers signing up for tours to Malaysia
A．shallow
B．sharp
C．suitable
D．secure
从十九大到二十大，是“两个一百年”奋斗目标的历史（）。
A.决胜期
B.交汇期
C.交汇点
