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【单选题】

高锰钢是目前最主要的耐磨钢,特点是高碳,高锰,且含有一定量的硅。

A.
错误
B.
正确
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题目标签:耐磨钢定量高碳
参考答案:
参考解析:
.
刷刷题刷刷变学霸
举一反三

【单选题】Part ADirections: Read the following four texts.Answer the questions below each text by choosing A, B, C or D.(40 points)The long year of food shortage in this country have suddenly given way to appar...

A.
The abundant food supply is not expected to last
B.
Britain is importing less food
C.
Despite the abundance, food prices keep rising
D.
Britain will cut back on its production of food

【单选题】不锈钢、耐热钢、耐磨钢属于()

A.
合金工具钢
B.
合金结构钢
C.
特殊性能钢
D.
合金性能钢

【多选题】提高碳转化率的方法有哪些?

A.
降低粉煤粒度
B.
提高反应温度
C.
采用加压气化
D.
合理组织流场;

【单选题】The long year of food shortage in this country have suddenly given way to apparent abundance. Stores and shops are choked with food. Rationing (定量供应 ) is virtually suspended, and overseas suppliers ha...

A.
the fall in world food prices would benefit British food producers
B.
an expansion of food production was at hand
C.
British food producers would receive more government financial support
D.
it looks depressing despite government guarantees

【单选题】定量检测AFP不能采用

A.
ELISA
B.
RIA
C.
对流免疫电泳
D.
荧光偏振免疫
E.
电化学发光