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【多选题】
曲轴一般用(),并经精磨加工,以达到较高的表面硬度和表面粗糙度的要求。A.
中碳钢
B.
中碳合金钢
C.
模锻
D.
为提高耐磨性和耐疲劳强度,轴颈表面经高频淬火或氮化处理
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反馈参考答案：
举一反三
【简答题】下列不属于zigbee网络的特点的是?A. 低成本 B. 高速率 C. 网络容量大 D. 自组网能力
【单选题】What was the key point discussed during the meeting?
A.
The security issues within Arabian countries.
B.
The change of the Arab League's voting system.
C.
The relevancy of the Arab League.
D.
The future of the Arab League's voting system.
【单选题】The employees brought up this issue during the meeting. This issue ________________ by the employees during the meeting.
A.
has been brought up
B.
is brought up
C.
was brought up
【简答题】DRI(名词解释)
【简答题】During the meeting
【单选题】___Tom is!
A.
How a careless man
B.
What a careless man
C.
What careless a man
D.
How so a careless man
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