高级排舞由（）段落组合而成，段落重复不固定，没有规律性，动作难度及变化复杂。
参考答案：3个或3个以上
A．He saw CN Tower he visited on TV.
B．He has visited CN Tower twice.
C．He has visited CN Tower once.
D．He will visit the CN Tower in June.
去甲肾上腺君用量过大会引起
A．脉压差增大
B．心肌收缩力减弱
C．心肌收缩力加强
D．血压下降
E．脉压差变小
