下图是被西方视作“神秘之师”的一支中国部队，这支部队担任的主要任务是
A．保卫海疆
B．核讹诈
C．核反击
D．军备竞赛
答案：C
— What ____ she often do in her spare time?
— She often plays the flute.[ ]
A. did
B. does
C. do
梅雨、伏旱现象发生在下列哪个地区（ ）
A．南部沿海
B．华北平原
C．东北平原
D．长江中下游平原
