题目内容

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.

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下列牌号钢筋中,属于热轧带肋钢筋的是( )。

A. HPB300
B. HRB600
CRB550
D. Q235B

碳素结构钢的牌号由代表、、、等四个部分按顺序组成。

Q255BF表示屈服点为MPa的、质量等级为级的钢。

受动载荷作用结构,焊接结构及低温下工作的结构,不能选用、质量等级钢及沸腾钢,需要选用对、有害元素控制严格的、质量等级的镇静或特镇静钢。