A.BrO 4 -
B.BrO 3 -
C.BrO -
D.Br 2
第2题
A.H3AsO3、HC2O4-、HS-
B. H3AsO3、HC2O4-、BrO
C. H3PO3、HC2O4-、N2H4
D. H3PO3、N2H4、BrO-
第3题
A..酸性介质中,溴元素中间价态的物质均易发生歧化
B.酸性介质中, HBrO能发生歧化
C.酸性介质中, BrO 4 - 能将 Br - 氧化为 BrO 3 -
D.酸性介质中,溴的含氧酸根都具有较强的氧化性
第4题
A. put back
B. broken down
C. held up
D. kept off
第6题
Not only _______ finish the task, but also he won the prize.
A.does his brother
B.his brother will
C.did his brother
D.will his brother
第7题
The old lady _________ on hearing her son’s death.
A、broke in
B、broke down
C、broke out
D、broke away
第8题
You can hardly imagine the difficulty the single mum had ______ her children.
A. brought up
B. to bring up
C. bringing up
D. to have brought up
第9题
A.no broadcast
B.no ip direct-broadcast
C.no ip broadcast
D.ip prodcast disable
第10题
条件测试是检查程序模块中所包含逻辑条件的测试用例设计方法,注重于测试程序中的条件。BRO(Branch and Relational Operator)测试保证能发现布尔变量和关系操作符只出现一次且没有公共变量的条件中的分支和条件操作符错误。考虑条件C1:(E1>E2) &(E3<E4),其中E1,E2,E3,E4是数学表达式,“&”表示逻辑“与”,“>”和“=”是关系运算符,则C1的条件约束至少为(26)时,就可以检查C1中的关系操作符错误。
A.{(>,=),(>,>),(>,<),(>,<),(=,<)}
B.{(<,<),(<,=),(<,>),(=,<),(=,=),(=,>),(>,<),(>,=),(>,>)}
C.{(>,<),(=,<),(>,=)}
D.{(>,<),(=,<),(>,=),(<,<)}
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