动车组不得通过半径小于180m的曲线，不得侧向通过小于9号的道岔
参考答案：对
-----Look! The girl dancing in the gym ____ be Joe. She is the girl who loves dancing too much, you know.
----- No, it ____ be her. Joe has gone to Shanghai.
A．must; mustn’t
B．must; can’t
C．can’t; mustn’t
D．can’t; can’t
