两栖动物幼体生活在水中用____呼吸，成体生活在陆地用____呼吸．
What did the writer think of Tom when he heard of his death?
There are __________ books on the desk.
若选用0～0.6A量程，电流表指针所对应的电流值为0.24A，则对应0～3A量程，电流表示数为（ ）
