单项选择题 有如以下模块： module test; reg [3:0] start,result; initial begin start = 1; result = (start ＜＜ 2); end endmodule程序运行完毕，result的值是（ ）A.4’b0100B.4’b0010C.6’b000100D.4’b0000
单项选择题 今欲配制—pH=7.20的缓冲溶液，所用0.10 mol/L 和0.10 mol/L NaOH溶液的体积比是（ ）。( 分别是2.12、7.20、12.36)A.1:3B.3:1C.2:3D.3:2
问答题 Fill in the blanks. To all who come to this(____) place: Welcome.(____) is your land. Here (____) relives fond memories of the (____) , and here(____) may savor the challenge and promise of the (____) A.happy B. youth C. Disneyland D. past E. future F. age