—This physics problem is too difficult. Can you show me _______, Li Lin?
—Of course.
A:what to work it out
B:what to work out it
C:how to work it out
D:how to work out it
I have two ____ (egg) for breakfast.
科学研究表明,在记忆方面,情绪高涨的学生,远比情绪低落的学生要好得多。这一事实表明 ( )
下列说法正确的一项是( )