A:温带
B:北寒带
C:北温带
D:亚热带
– Mum, I've been studying English since 8 o'clock. _____ I go out and play with Tom for a while?– No, I'm afraid not. Besides, it's raining outside now.
经常感冒注射青霉素,如果反复使用,致使细菌对青霉素的抗药性越来越强,疗效越来越弱,开发新的青霉素也对付不了一些细菌,为什么?请思考回答:
①旖旎的热带风光 ②名胜古迹 ③名山大川 ④主题公园