由国外退回我国的空邮袋，在国内续运时一律按航空方式运输。（）
参考答案：错
You don't need _____ your watch oiled. It works quite well and doesn't need _____ .[ ]
A. to have, oiling
B. having, oiling
C. having, to be oiled
D. to have, being oiled
肺动脉高压早期的X线表现是（）
A.双肺纹理增多
B.双肺透亮度增加
C.右下肺动脉主干增宽
D.右心房肥大
E.右心室肥厚、扩张
