What is the topic of this passage().
A. Insects that feed on plants.
B. Animals that feed on insects.
C. Plants that use insects to survive.
D. Insects that are attractive to plants.
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How did they choose a lawyer().
A friend recommended a lawyer to them.
B. They will find a lawyer by themselves.
C. They will use an agency to find a lawyer.
D. They will send one of their HR people to hire a lawyer.
设A、B均为可逆矩阵，则必有（）。
A. (A+B)-1=A-1+B-1
B. (AB)-1=A-1B-1
C. (AB)*=A*B*
D. |(AB)*|=|A|n-1|B|n-1
During parties, the speaker used to().
A. enjoy the wine and delicious foods.
B. pretend to be lonely.
C. sit alone and wait someone to talk to him.
D. talk to the interesting looking people.
Which did not launch the "road map" plan in 2003().
A. United States.
B. Russia.
C. European Union.
D. Saudi Arabia.
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