实际国民收入与潜在义国民收入的差异，可以反映一个经济社会的就业状况和经济增长情况
参考答案：对
30. —I _________ his telephone number.
—I have his number, but I _________ to bring my phone book.”
A．forget, forget
B．forgot, forgot
C．forgot, forget
D．forget, forgot
直肠指检用于判断____，有反应时可感觉到____，代表____。
