预算公开的例外是指（）。
A、举借债务的情况
B、预决算执行情况的报表、报告
C、政府采购
D、涉及国家秘密
参考答案：D
—What's your father?
— ________.[ ]
A. He's fine.
B. He works in a supermarket.
C. He wants to be a doctor.
D. He's a shop assistant.
全波整流电路由（）个二极管构成。
A.2
B.3
C.4
D.5
