(1-2)(3-4)(5-6)…(99-100)=______.
原式=(-1)50=1.
Tomorrow he ______ a kite in the open air first, and then ______ boating in the park. [ ]
A. will fly; will go
B. will fly; goes
C. is going to fly; will goes
D. flies; will go
下列哪一个学派不是在金元时期形成的()
A、攻邪学派
B、丹溪学派
C、温补学派
D、易水学派