下例程序执行后，X和Y的值分别为（ ）。 process(A,B,C)variable D : std_logic;begin D := A; X <= B+D; D := C; Y <= B+D;end process;
A、B+C和B+A
B、B+C和B+C
C、B+A和B+C
D、B+A和B+A

单项选择题‎物流服务合同（广义）是指​

单项选择题You have organized the findings section of your information report by answering who, what, when, where, why, and how. This pattern is called ____. A、chronological B、journalism style C、geographical D、alphabetical