要使7□6010≈80万，□应填（　　）

某企业要求计算机机房内开机时的温度、湿度应满足A级标准。按照该标准，夏天开机时对机房内的温度要求是 (1) ，相对湿度要求是 (2) 。

加号

减号

乘号

假设用12个二进制位表示数据。它能表示的最大无符号整数为（8）；若采用原码，它能表示的最小负整数为（9）。

某系统中有四种互斥资源R1、R2、R3和R4，可用资源数分别为3、5、6和8。假设在T ₀ 时刻有P1、P2、P3和P4四个进程，并且这些进程对资源的最大需求量和已分配资源数如下表所示，那么在T ₀ 时刻系统中R1、R2、R3和R4的剩余资源数分别为 (1) 如果从T ₀ 时刻开始进程按 (2) 顺序逐个凋度执行，那么系统状态是安全的。

某数据库中有供应商关系S和零件关系P，其中，供应商关系模式S（Sno，Sname，SZip，City）中的属性分别表示；供应商代码、供应商名、邮编、供应商所在城市；零件关系模式P（Pno，Pname，Color，Weight，City）中的属性分别表示：零件号、零件名、颜色、重量、产地。要求一个供应商可以供应多种零件，而一种零件可以由多个供应商供应。请将下面的SQL语句空缺部分补充完整。

查询供应了“红”色零件的供应商号、零件号和数量（Qty）的元组演算表达式为：

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Would you believe that the first outstanding deaf teacher in America was Laurent Clerc, a Frenchman At 12, he (36) the Royal Institution for the Deaf in Paris where he became a top student. After (37) , the school asked him to stay on as a (38) .

Meanwhile, an American named Thomas Gallaudet was studying to be a minister. (牧师) (39) he met a young girl who was deaf. He was disappointed to learn that there were no (40) for the deaf in America. (41) , in 1815 Gallaudet sailed to London to (42) information on deaf education. However, he was (43) to get help and became frustrated (灰心的). Fortunately he met a French educator who (44) him to go to Paris to spend three months (45) at the school where Clerc was working. The school asked Clerc to teach (46) sign language. As a result, the two men (47) each other.

When the time came for Gallaudet to (48) America, he asked Clerc to come with him. The two men (49) in June 1816. The voyage (50) the Atlantic (大西洋) took days. They put the time to productive use, (51) for the new school for the deaf (52) they wanted to ’open. Such a school was (53) the following year in Connecticut.

At the school, Clerc led a busy life. Although he wanted to return to France, he (54) did. He died on July 18, 1869, still in America. France’s (55) was America’s gain!

若每一条指令都可以分解为取指、分析和执行三步。已知取指时间t_取指=4△t，分析时间t_分析=3△t，执行时间t执行=5△t。如果按串行方式执行完100条指令需要 (4) △t。如果按照流水线方式执行，执行完100条指令需要 (5) △t。

 

两个节点通过长度为L(米)、数据率为B(19ps)、信号传播速度为C(米/秒)的链路相连，要在其问传输长度为D(位)的数据。如果采用电路交换方式，假定电路的建立时间为S(秒)，则传送全部数据所需要的时间为 (2) 。如果采用分组交换方式，假定分组的长度为P(位)，其中分组头部长度为H(位)，采用连续发送方式。忽略最后一个分组填充的数据量，要使电路交换方式的传送时间小于分组交换方式的传送时间，则应满足的条件是 (3) 。

48

64

128

某企业要求计算机机房内开机时的温度、湿度应满足A级标准。按照该标准，夏天开机时对机房内的温度要求是 (1) ，相对湿度要求是 (2) 。

加号

减号

乘号

假设用12个二进制位表示数据。它能表示的最大无符号整数为（8）；若采用原码，它能表示的最小负整数为（9）。

某系统中有四种互斥资源R1、R2、R3和R4，可用资源数分别为3、5、6和8。假设在T ₀ 时刻有P1、P2、P3和P4四个进程，并且这些进程对资源的最大需求量和已分配资源数如下表所示，那么在T ₀ 时刻系统中R1、R2、R3和R4的剩余资源数分别为 (1) 如果从T ₀ 时刻开始进程按 (2) 顺序逐个凋度执行，那么系统状态是安全的。

某数据库中有供应商关系S和零件关系P，其中，供应商关系模式S（Sno，Sname，SZip，City）中的属性分别表示；供应商代码、供应商名、邮编、供应商所在城市；零件关系模式P（Pno，Pname，Color，Weight，City）中的属性分别表示：零件号、零件名、颜色、重量、产地。要求一个供应商可以供应多种零件，而一种零件可以由多个供应商供应。请将下面的SQL语句空缺部分补充完整。

查询供应了“红”色零件的供应商号、零件号和数量（Qty）的元组演算表达式为：

>

$amp;

=

Would you believe that the first outstanding deaf teacher in America was Laurent Clerc, a Frenchman At 12, he (36) the Royal Institution for the Deaf in Paris where he became a top student. After (37) , the school asked him to stay on as a (38) .

Meanwhile, an American named Thomas Gallaudet was studying to be a minister. (牧师) (39) he met a young girl who was deaf. He was disappointed to learn that there were no (40) for the deaf in America. (41) , in 1815 Gallaudet sailed to London to (42) information on deaf education. However, he was (43) to get help and became frustrated (灰心的). Fortunately he met a French educator who (44) him to go to Paris to spend three months (45) at the school where Clerc was working. The school asked Clerc to teach (46) sign language. As a result, the two men (47) each other.

When the time came for Gallaudet to (48) America, he asked Clerc to come with him. The two men (49) in June 1816. The voyage (50) the Atlantic (大西洋) took days. They put the time to productive use, (51) for the new school for the deaf (52) they wanted to ’open. Such a school was (53) the following year in Connecticut.

At the school, Clerc led a busy life. Although he wanted to return to France, he (54) did. He died on July 18, 1869, still in America. France’s (55) was America’s gain!

若每一条指令都可以分解为取指、分析和执行三步。已知取指时间t_取指=4△t，分析时间t_分析=3△t，执行时间t执行=5△t。如果按串行方式执行完100条指令需要 (4) △t。如果按照流水线方式执行，执行完100条指令需要 (5) △t。

 

两个节点通过长度为L(米)、数据率为B(19ps)、信号传播速度为C(米/秒)的链路相连，要在其问传输长度为D(位)的数据。如果采用电路交换方式，假定电路的建立时间为S(秒)，则传送全部数据所需要的时间为 (2) 。如果采用分组交换方式，假定分组的长度为P(位)，其中分组头部长度为H(位)，采用连续发送方式。忽略最后一个分组填充的数据量，要使电路交换方式的传送时间小于分组交换方式的传送时间，则应满足的条件是 (3) 。

48

64

128