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【简答题】
根据所学知识填空： （1）3.01×10 23 个OH - 中含有质子的物质的量为______mol，含电子的数目为______，与______molNH 3 具有相同的质量． （2）同温同压下，气体A与氧气的质量比为1：2，体积比为1：4，气体A的摩尔质量是______ （3）在标准状况下，如果2.8L氧气含有n个氧原子，则加德罗常数可表示为______．
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【简答题】Tom Smith was a writer. He wrote detective stories for magazines. One evening he could not find an end for a story. He sat with his typewriter in front of him, but he had no ideas. So he decided to go...
【单选题】按照标准·普尔公司债券信用评级的标准,具有“投资级债券”的是( )。
A.
B级以上的信用等级
B.
BB级以上的信用等级
C.
BBB级以上的信用等级
D.
C级以上的信用等级
【单选题】He found he could no longer cope with his ___________ job.
A.
ever-changing
B.
cathartic
C.
surefire
D.
demanding
【单选题】He hasn’t found a job yet because he had no ________ to anybody who could help him.
A.
approach
B.
application
C.
access
D.
approval
【单选题】下列关于分组交换机和转发表的说法错误的是________
A.
分组交换网中的交换机称为分组交换机或包交换机
B.
每个交换机均有转发表，用于确定收到的数据包只从哪一个端口转发出去
C.
交换机中转发表的路由器信息是固定不变的
D.
交换机的端口有的连接计算机，有的连接其它交换机
【简答题】论述岩体力学法的基本出发点是什么?采用哪种计算模式?
【简答题】2-16 请列举开路电压Voc和短路电流isc的求解方法?
【单选题】He tried to return to work, but found he could no longer cope with his _____ job.
A.
demand
B.
demanded
C.
demanding
D.
requiring
【单选题】选最佳的词填空。 He found he could no longer cope with his ___________ job.
A.
ever-changing
B.
cathartic
C.
surefire
D.
demanding
【简答题】He tried to return to work, but found he could no longer cope with his job. (demand)
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