已知氢气的爆炸极限是4%-75%,那么氢气可燃气体报警仪设定的一级报警值是()二级报警值是()。
A、1%;2%
B、1%;1%
C、2%;1%
D、2%;2%
参考答案:A
The artist will not paint people or animals but he will paint anything ________ .
A.that the little girl asks him
B.the little girl asks him to
C.for the little girl to ask him
D.what the little girl asks him
由于能源和原材料紧张导致的通货膨胀被称为()。
A.需求拉上型通货膨胀
B.成本推进型通货膨胀
C.结构型通货膨胀
D.混合型通货膨胀