钢中锰含量增加0.1%,其强度极限可提高()N/mm2
A.30
B.20
C.36
D.46
参考答案:C
If parents have children help with housework, the children will feel needed. ______, they will learn to take care of themselves.
A.On the contrary
B.In a word
C.That is to say
D.What’s more
FIDIC《土木工程施工合同》通用条款规定,如果某项工作的工程量的变化直接造成该项工作单位成本的变动超过( ),该工作应采用新的费率或价格。
A.10%
B.1%
C.0.1%
D.0.01%