吊环与液面脱离前的最大电压对应的是
A. 吊环所受重力
B. 吊环下沿所粘连液体的重力
C. 吊环和粘连液体的重力
D. 吊环和粘连液体的重力以及液体表面张力
The Romantic writers would focus on all the following issues EXCEPT the _____ in the American literary history.
A. individual feelings
B. idea of survival of the fittest
C. strong imagination
D. return to nature
吊环与液面脱离后稳定的电压对应的是
A. 吊环所受重力
B. 吊环下沿所粘连液体的重力
C. 吊环和粘连液体的重力之和;
Choose the authors who belong to the romantic group in American literature.
A. Edgar Allan Poe
B. Henry David Thoreau
C. Nathaniel Hawthorne
D. All of the above