生殖季节，雄蛙的鸣囊鼓起，叫声响亮其目的是 [ ]
A．吸引雌蛙
B．吓退敌害
C．表示体外受精完成
D．引诱昆虫
答案：A
16位PC微机中整数的有效范围是( )。
A．-32768～+32767
B．-32767～+32767
C．0—65535
D．-32768～+32767或0～65535
Picasso''s________ability was apparent in his early youth when he started drawing sketches.
A．writing
B．artistic
C．reasoning
D．literary
