The actress is already 50, but she looks ______ than she really is.
A:young
B:more young
C:more younger
D:much younger
京杭运河北起____,南至____,连接北京,天津两市及河北,山东,江苏,浙江四省。
如图,把一块含有45°的直角三角形的两个顶点放在直尺的对边上.如果∠1=20°,那么∠2的度数是( )