撬棍要直，不得弯曲过大，有弯曲的弯曲度不得超过（）
A、3°
B、4°
C、2
参考答案：B
To our _____, people in Town Lu found it entertaining to hear Sister Xianglin's heart-broken story of the
death of Amao. [ ]
A. attraction
B. impression
C. astonishment
D. interest
某同学用显微镜观察时，若目镜为5×，物镜为10×，则物像的放大倍数是
A．5倍
B．10倍
C．15倍
D．50倍
