【单选题】We a science today.We an English class now. [ ]
A.
aren’t having ;are having
C.
don’t have; are having
【单选题】We have an English class on Monday. , we don't have an English class on Thursday.
【简答题】A.When we are attending an English language course. B.When we are watching an interesting TV program. C.When we are enjoying the murmuring of a brook. D.When we are listening for a friend's voice in a...
【多选题】设函数 ,则下列正确的有( ).
D.
y ( n ) = e x ( n + x )
E.
y ( n ) = e x ( n +2 x )
【单选题】按照化学渗透学说,驱动F0F1-ATP合酶合成ATP的力是:
【单选题】We an English class now, and we a math class this afternoon.
【简答题】设 是 上的奇函数, . 当 时,有 ,则 .
【单选题】按照化学渗透学说,驱动F 0 F 1 -ATP合酶合成ATP的力是______。