小明的体重是50kg，若他用20s的时间登上6 m高的楼房，克服自身重力做功，登楼的功率是________W。
150
_____ there are few words in the story, he can’t understand it. [ ]
A. Through
B. Though
C. From
D. Across
女性生殖器官和盆腔的主要淋巴有哪些？
