金属键既有方向性又有饱和性。
参考答案:错
-Miss Read is good ____ music.
-And she can be good _____ children in the music club.
A.at; at
B.with; with
C.at; with
D.with; at
()要在整个训练过程中系统、持久地安排灵敏素质训练。
A.力量训练
B.速度训练
C.耐力训练
D.灵敏训练