在VHDL中,为定义的信号赋初值,应该使用()符号。
A.=:
B.=
C.:=
D.<=
参考答案:D
任务型阅读: 有几位学生遗失了一些物品,请根据以下信息为他们写完寻物启事。
Peter: I lost a gold watch. If you find it, call me at 680-7432.
Jim : I found a computer game. My phone number is 512-8843.
Henry: I lost a set of keys. Who found them, please call 476-3539.
Sam: I found a notebook with the name "Kevin Clark". My phone number is 555-0287.
Lost & Found
Found: Lost:
Is this your computer game? 2
Please call Jim. My name is Henry Cooper.
Phone# 1 Please call me at 476-3539.
Lost: Kevin:
A gold watch. Is this your 4 ?
My name is 3 . Please call me at 5 .
My phone number is 680-7432. Sam.
关于氧气、二氧化碳、二氧化硫、氧化铝、过氧化氢五种物质,下列叙述中正确的是( )
A.都含有氧分子
B.都含有氧元素
C.都是氧化物
D.都是化合物