支撑跳跃通常由（）、（）、（）、第一腾空、推手、第二腾空、落地七个阶段组成。
参考答案：助跑；上板；踏跳
He felt lonely in the first month abroad, but after some time he got ______ alone and even enjoyed ______ there. [ ]
A. used to living; to study
B. used to five; studying
C. used to living; studying
D. used to live; to study
香港、澳门面积不断扩大的最主要方式是[ ]
A．填海造地
B．地壳运动
C．泥沙淤积
D．军事扩张
