机体维生素D缺乏的体征有（）
A、方颅
B、鸡胸
C、哈氏沟
D、甲状腺肿大
参考答案：A, B, C
A．速度变化量越大，速度变化率一定也大
B．速度越大，速度变化量一定越大
C．速度变化率等于零，速度一定等于零
D．速度大，速度变化率不一定大
Your success has resulted ______ your hard work. His angry words resulted ______ a fight.
A．from; from
B．in; in
C．in; from
D．from; in
