设有补偿器的管道应设置（），其结构形式和位置应符合设计要求。
A.滑动支架
B.导向支架
C.固定支架
D.弹簧支架
参考答案：C
钢材在复杂应力状态下的屈服条件是由（）等于单向拉伸时的屈服点确定的。
A、最大主拉应力σ1;
B、最大剪应力τ1;
C、最大主压应力σ3;
D、折算应力σeq。
In a discussion about the factors that determine a firm’s demand for labor, Kathleen Jorgensen asserts the following: Statement 1: A firm’s marginal revenue curve is equivalent to its short-run labor demand curve. Statement 2: A decrease in the equilibrium market price of a firm’s product will increase the firm’s demand for labor because the firm will sell more units of the product. Are Jorgensen’s statements correctStatement 1 Statement 2（）①A. Correct Correct ②B. Correct Incorrect ③C. Incorrect Incorrect
A. ①
B. ②
C. ③
