题目内容
(请给出正确答案)
[主观题]
It was____________ that the writer read an article in ESJ which helped him understand the
"ghost hair" thing.
答案
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第1题
第2题
There was____________(排了那么长的队) at the exhibition that we had to wait for about half an hoar.
第3题
It was____________(直到我家) that I realized that I had left my camera in the train.
第4题
It was____________(在危难时刻)that I finally found out what he was really like.
第6题
已知f1(t)=tε(t),f2(t)=ε(t)一ε(t一2),求y(t)=f1(t)*f2(t一1)*δ’(t一2)。
第7题
若f1(t)=e-atu(t),f2(t)=sintu(t),求f1(t)*f2(t).
第8题
A.don't include
B.can't include
C.aren't included
D.haven't included