Jack and Anna are good friends. They are Chinese. Jack likes sports very much. He can play volleyball , basketball and football . Anna likes music very much . She can't play ball games. But they both like playing on computers . They like eggs , bread and milk for breakfast . For lunch , Anna likes eating vegetables and fruit , but Jack likes chicken and fish . They both like hamburgers .But they don't like ice cream or rice.

如图，△ACB≌△A′CB′，∠A′CB=30°，∠A′CB′=70°，则∠ACA′的度数是（　　）

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如图，已知AB∥CD，∠B=65°，CM平分∠BCE，∠MCN=90°，求∠DCN的度数．