Just as the saying goes, “When in Rome, do as the do.”
A:Rome
B:Romans
C:Germany
D:Germans
真菌比细菌结构复杂。李阳同学认为复杂之处在于真菌()
如图所示,把一块洁净的玻璃板吊在橡皮筋下端,使玻璃板水平接触水面.如果你想使玻璃板离开水面,拉橡皮筋拉力与玻璃板重力谁大?原因是水分子和玻璃的分子间存在什么力作用?