A.are shown,is
B.are showing,is
C.have shown,are
D.wil show,are
第4题
Why are some people against TV?
A.Because TV programs are not interesting.
B.Because TV viewers are really passive.
C.Because TV prices are very high.
D.Because TV has both advantages and disadvantages.
第7题
What are sold out in that shop?
A.Color TV sets.
B.All the TV sets.
C.Some color TV sets.
第8题
A.-2×1.414sinωtV
B.2×1.414sinωtV
C.-1.414sinωtV
D.1.414sinωtV
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