document.write('儿童随着年龄的增长，眼轴的长度（）&nbsp;&nbsp;<font color="#0000CC" onclick="showMsg(\'正确答案为: A:增长\',\'center\');" title="正确答案为: A:增长">提示</font><br><input type="radio" name="vvv" id="v1" value="A" /><label for="v1">A:增长</label><BR><input type="radio" name="vvv" id="v2" value="B" /><label for="v2">B:缩短</label><BR><input type="radio" name="vvv" id="v3" value="C" /><label for="v3">C:不变</label><BR><input type="radio" name="vvv" id="v4" value="D" /><label for="v4">D:不知道</label>');