仪表风系统恢复后，就可以恢复预聚物输送系统的运转。（）
参考答案：错
解析：要等预聚输送系统温度升到正常，才能恢复。
我国乙型肝炎病毒表面抗原主要的亚型是
A．adr和adw
B．ayr和ayw
C．adr和ayr
D．adr和ayw
E．ayr和adw
Are the following statements about trade debt and customer advances true or false Statement 1: Trade debt is reported in the balance sheet at the present value of the future expected cash flows discounted at the firm’ s weighted-average cost of capital. Statement 2: For analytical purposes, customer advances should be viewed as a prediction of future revenues rather than as an expected cash outflow.Statement 1Statement 2 ①A. False True ②B. False False ③C. True True
A．
B．
C．
