历史文化保护区是指古迹比较集中或较完整的保存着城市某一历史时期的传统风貌和地方民族特

假设VAR为字节变量，下 * * 条指令中功能相同的是哪几条？　　Ⅰ．MOV AL，VAR[2] Ⅱ．MOV AL，VAR+2 Ⅲ．MOV AL，2[VAR]

A．3条都相同

B．仅Ⅰ和Ⅱ相同

C．仅Ⅰ和Ⅲ相同

D．仅Ⅱ和Ⅲ相同

按要求变化下列各句。

1. She walked so slowly that she missed the last bus. (改为并列句)

    She walked _____ slowly ____ catch up with the last bus.

2. I forgot everything. So did Tom. (改为同义句)

   ____ Jim ____ I couldn't ____ everything.

3. Have you visited the Great Wall? Cold you tell me?

   Could you tell me ____ you ___ visited the Great Wall?

4. Work hard, or you'll fall behind others. (改为同义句)

    ____ you ____ work hard, you will fall behind others.

5. The math problem is too difficult for him to work out. (改为复合句)

    The math problem is ____ difficult ____ he can't work out.

汽车尾气无害化处理反应为2NO(g)＋2CO(g)N₂(g)＋2CO₂(g) 。下列说法错误的是

A．升高温度可使该反应的正逆反应速率同时增大

B．单位时间内消耗CO和NO的物质的量相等时，反应达到平衡

C．反应达到平衡后，NO的反应速率保持恒定

D．使用高效催化剂可增大反应速率

对肾脏负担最轻的是（）

A.优降糖

B.二甲双胍

C.糖适平

D.罗格列酮

E.氯磺丙脲