在有风时模型飞机起飞、降落应该()。
A、迎风
B、顺风
参考答案:A
— Thank you very much.
— You are welcome. I was ______ glad to help.
A.too much
B.only too
C.not so
D.very much
易恶变的肿瘤为()
A.化牙骨质纤维瘤
B.纤维骨瘤
C.骨化纤维瘤
D.牙骨质母细胞瘤
E.骨纤维结构不良