读对话，判断正(√)误(×)。

Amy: Excuse me. Where is the library?

Wu: It's near the gym.

Amy: And then?

Wu: Turn left at the gym, then go straight. It's on the left.

Amy: Thank you.

Wu: You're welcome.

( ) 1. Amy wants to go to the cinema.

( ) 2. She goes there by bus.

( ) 3. She turns left at the gym.

( ) 4. The library is on her left.

若有以下定义： char a；int b； float c；double d; 则表达式a*b+d-c值的类型为 【7】 。