再生障碍性贫血的主要原因是
A．造血原料缺乏B．红细胞内在缺陷C．红细胞寿命缩短D．骨髓造血功能衰竭E．红细胞破坏过多
参考答案：D
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.
一个人的心理压力容忍力与( )有关。
A．生理因素
B．个性品质
C．环境因素
D．教育程度
E．社会经验
