A:番茄细胞失水
B:番茄细胞吸水
C:糖水浓度比番茄细胞浓度低
D:以上都不对
—The final round of the competition is coming near. Can I really do well this time?—Believe in ______. You're always the best in our school.
先化简,再求值: m−33m2−6m ÷ (m+2−5m−2) ,其中m是方程x2+2x﹣3=0的根.
汶川地震后我国无人驾驶飞机迅速对该地灾情进行监测,主要运用了( )