问题
填空题
扫描法识别行列式键盘的有效按键时，置所有列线全部为0，如果读入的行线值全为1，则说明（）。
答案
参考答案：读行线状态
搜题请搜索小程序“爱下问搜题”
扫描法识别行列式键盘的有效按键时，置所有列线全部为0，如果读入的行线值全为1，则说明（）。
参考答案：读行线状态
| 完形填空。 | ||||
| Stone is all around us. Stone is usually very hard, 1 it can also be soft. Stones have many uses. In some 2 , artists carve (雕刻) beautiful things out of soft stones, because they can be shaped easily. In ancient times, people carved 3 persons or animals out of soft stones, which could be carried along with. While in some European countries, statues (雕塑) are carved 4 hard stones and they do not change easily. In summer, the hot sun 5 on these statues and in winter the snow falls on them, but they 6 remain beautiful. Stone is strong and long-lasting. So, it is 7 enough for building. A house built of stone does not catch fire as easily as 8 made of wood. Some stones are coloured, so they make the 9 look wonderful. People can also get a fire with stones. Besides, some kinds of stones can be used to 10 jewellery (珠宝). We've found stones are really amazing. | ||||
|