企业通过市场调查,预测用户需求趋势,并据此决定开发和销售的产品是()。
A. 用户订货开发的新产品
B. 企业自主开发的新产品
C. 地区新产品
D. 仿制新产品
热电偶输出电势与( )有关。
A. 热电偶两端温度
B. 热电偶两端温度和电极材料
C. 热电偶两端温度和电极长度
D. 热电偶两端温度、电极材料及长度
"This is where the fun starts! Or is it?" By this sentence , the writer means to remind the students that besides the fun, they will also face some other challenges.
A. 对
B. 错
"Your essay does not address the real issue" means your essay does not deal with the real problems.
A. 对
B. 错