题目内容

在相同强度条件下,低合金钢与合金钢的回火温度要比非合金钢高。A.对 B. 错

A. 对
B. 错

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在相同的回火温度下,低合金钢与合金钢比同样含碳量的非合金钢具有更高的硬度。A 对 B 错

A. 对
B. 错

低合金钢与合金钢是按所含合金属元素的质量分数来划分的。A 对 B 错

A. 对
B. 错

Listen to anintroduction about Silicon Valley and tell whether the following statements are true or false. 1.Silicon Valley is the northern part of the San Francisco Bay Area in Northern California.

A. 对
B. 错

The cutting-edge entrepreneurs, engineers and venture capitalists enable Silicon Valley to remain the leading high-tech hub.

A. 对
B. 错

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