What is one of the differences between cats and dogs?
A. Cats want to be close to humans.
B. Cats want to make humans happy.
C. Dogs regard humans as their equals.
Dogs regard humans as their masters.
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用于焊接过程中，预热区，焊接区，冷却区氮气保护，杜绝焊点或铜箔高温下氧化，提高焊点质量是设备里抽风系统的功能。
A. 对
B. 错
What is one country in the Middle East trying to do?
A. Create a new government.
B. Make its citizens happier.
C. Make the world people happy.
D. Create a new office in the government.
What do people complain about the government?
A. The government doesn’t do anything to make people happy.
B. The government doesn’t care whether people are happy or not.
C. The government hasn’t created an office to study people’s happiness.
D. The government hasn’t solved many problems that make people unhappy.
下列牌号钢筋中,属于热轧带肋钢筋的是( )。
A. HPB300
B. HRB600
CRB550
D. Q235B
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