在土耳其举行的举重世锦赛男子69公斤级比赛中,我国选手廖辉最后一举顺利地举起了198㎏的杠铃夺得冠军,如图所示是他在举重时的情形。下列说法中正确的是( )
A:他将杠铃举高1.7m做的功约为336.6J
B:他将杠铃举过头顶后静止了3s,此过程中做的功约为3366J
C:他用3s的时间的时间将杠铃举高1.7m,做功的功率约为1122W
D:不论是在举起杠铃的过程还是杠铃静止在头顶,他都做了功
我们在实际工作中,都会面对处理工作计划与工作实际的关系,这在哲学上就是处理( )
阅读课文《订鬼》第二段,回答下列问题。
(二)
This is my room. Near the window there is a desk. I often do my homework at the desk. You can see some books, some flowers, a ruler and a pen on it. On the wall near the desk there is a picture of a cat. There is a clock above my bed. I usually put my football under my bed. There is a chair in front of the desk. I can see the trees and the roads outside when I sit there.
阅读短文,选择最佳答案。
人类的精子里含的性染色体是( )