以下语言是数据流建模方式吗？ A: xor x1(a,b,c): B: assign adder_out = mult_out + out; C: always @ (a or b or sel) begin if (sel) c = a; else c = b;?end D: and a1(out,in1,in2);

对于完整的一位全加器VHDL程序，描述正确的是 A: 如果port内的管脚定义为STD_LOGIC，则库和程序包可以省略 B: ENTITY adder IS PORT( A ,B,Ci_1: IN STD_LOGIC; Ci,Si : OUT STD_LOGIC; ); END adder; C: ARCHITECTURE 1fxc OF adder IS BEGIN Si<=(not A and not B and Ci_1) or (not A and B and not Ci_1) or (A and not B and not Ci_1) or (A and B and Ci_1); Ci<=(A and B) or (B and Ci_1) or (Ci_1 and A); END 1fxc; D: 实体名和结构体名都必须是标识符

对于完整的一位全加器VHDL程序，描述正确的是 A: 如果port内的管脚定义为STD_LOGIC，则库和程序包可以省略 B: ENTITY adder IS PORT( A ,B,Ci_1: IN STD_LOGIC; Ci,Si : OUT STD_LOGIC; ); END adder; C: ARCHITECTURE 1fxc OF adder IS BEGIN Si<=(not A and not B and Ci_1) or (not A and B and not Ci_1) or (A and not B and not Ci_1) or (A and B and Ci_1); Ci<=(A and B) or (B and Ci_1) or (Ci_1 and A); END 1fxc; D: 实体名和结构体名都必须是标识符

linked up with the National Health Service (NHS) in the UK to ______ advice capability A: add a health B: adder health C: ad a health D: add the health

【单选题】3 . Aron ______ water five days later. A . ran out B . used out C . ran out of D . used out of A. A ． ran out B. B ． used out C. C ． ran out of D. D ． used out of

Howabout_______for a walk? A: go out B: went out C: going out D: will go out

The bookhis experience in India. A: came out in B: came out of C: came out at D: came out with

There was a power cut and all the lights _____. A: went out B: go out C: died out D: made out

I learned to ______the background noise. A: let out B: get out C: leave out D: tune out

The stars ____ as soon as it was dark. A: come out B: came out C: have come out D: will come out