第1题:
If the amount exceeds that figure, payment ()L/C will be required.
A、at
B、by
C、for
D、in
第2题:
A.don’t … at
B.didn’t … at
C.didn’t … in
D.don’t ...in
第3题:
We’ll inform. you as soon as tickets become ______.
A. valuable
B. capable
C. acceptable
D. available
第4题:
拉氏变换齐次性表达式是(),A为常数。
A.L[f(t)]=1/AL[f(t)]
B.L[Af(t)]= AL[f(t)]
C.L[Af(t)]= AL[Af(t)]
D.L[Af(t)]=L[f(At)]
第5题:
第6题:
第7题:
A. L2F
B. PPTP
C. Circuit cross-connect
D. Draft-Martini-based VPNs
E. Draft-Kompella-based VPNs
第8题:
I () his offer, but I didn’t() it.
A. receive...accept
B. received…accepted
C. accepted…received
D. received…accept
第9题:
第10题:
1、拉氏变换齐次性表达式是(),A为常数。
A.L[f(t)]=1/AL[f(t)]
B.L[Af(t)]= AL[f(t)]
C.L[Af(t)]= AL[Af(t)]
D.L[Af(t)]=L[f(At)]