题目内容

8051单片机是微处理器。

A. 对
B. 错

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8051单片机的串行接口是全双工的。

A. 对
B. 错

Listen to the dialogue and fill in the blanks with the words you hear.Edward: Linda , could you 1_____ ?Linda：OK. What’s up?Edward: Could you help me to2_?Linda：OK. Where is it?Edward：Thank you. Here you are. You type really fast.Linda：Alright, I’ve 3__typing the contract for you.Edward：Would you like to have dinner together？4_ ! You have helped me a lot today.Linda：It’s no big deal.5_ should help 6___________ .

松科植物（）。

A. 苞鳞与种鳞半合生
B. 苞鳞与种鳞合生
C. 苞鳞与种鳞离生

松科植物习性为（）；花（）性；（）同株。