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【单选题】
如果一个存储单元能存放一个字节,那么一个32KB的存储器共有( )个存储单元
A.
32000
B.
32768
C.
32767
D.
65536
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参考答案:
举一反三
【简答题】主要的胃肠激素有 、 、 、 四种。
【简答题】完形填空 A soldier returned to his castle at dawn.He was in a mess.His clothes were 1 ; his face was bloody; his horse was lame.His 2 met him at the gate,asking,'What has happened to you?' 3 himself up as...
【单选题】The young man s clothes were scattered about his room______.
A.
at will
B.
at random
C.
with a hurry
D.
at time
【单选题】细菌对青霉素产生耐药的主要原因是
A.
噻唑环开环
B.
细菌遗传进化
C.
细菌可产生酸性物质
D.
β-内酰胺环水解
E.
以上都不对
【单选题】金葡菌对青霉素产生耐药性的主要原因是
A.
产生β-内酰胺水解酶
B.
诱导肝药酶
C.
产生钝化酶
D.
降低细胞膜通透性
【单选题】细菌对青霉素产生耐药的主要原因是( )
A.
对酸不稳定
B.
对碱不稳定
C.
β- 内酰胺酶
D.
高温
E.
胃酸
【简答题】重要的胃肠激素主要有_________、_________、_________、_________和_______等。
【简答题】胃肠激素的作用主要有______、______和______。
【单选题】细菌对青霉素产生耐药性的主要原因是
A.
产生水解酶
B.
产生钝化酶
C.
改变代谢途径
D.
改变细胞膜通透性
E.
改变核糖体结构
【简答题】When we found him, he was a sorry sight. His clothes were torn, his hands bleeding. Before we reached him, we saw him fall. He lay a moment. Then he pulled himself to his feet, walked unsteadily a few...
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