A:as few as
B:as little as
C:as many as
D:as much as
It seems that El Niño ____ some disasters in the world in the past few months.
读某地一年中气温日变化的分布图(单位:℃)。有关该地区气候的叙述,正确的是 ( )
人在呼气时,肋骨间的肌肉和膈肌的活动状况、肺内的气体压力变化依次是( )
①肋骨间的肌肉收缩 ②肋骨间的肌肉舒张 ③膈肌收缩 ④膈肌舒张
⑤肺内的气体压力降低 ⑥肺内的气体压力增大.