【单选题】对340nm紫外光有吸收特性的辅酶是( )
【简答题】下列说法中: ①若定义在R上的函数f(x)满足f(x+2)=-f(x-1),则6为函数f(x)的周期; ②若对于任意x∈(1,3),不等式x 2 -ax+2<0恒成立,则 a> 11 3 ; ③定义:“若函数f(x)对于任意x∈R,都存在正常数M,使|f(x)|≤M|x|恒成立,则称函数f(x)为有界泛函.”由该定义可知,函数f(x)=x 2 +1为有界泛函; ④对于函数 f(x)= x-1 x+...
【单选题】An import tariff will cause the terms of trade of the ________ country to ________ and will ________ the country.
A.
importing; improve; benefit
B.
exporting; improve; benefit
C.
importing; suffer; harm
D.
exporting; improve; harm
E.
importing; improve; harm
【判断题】An import tariff will worsen the terms of trade for a "small" country but improve the terms of trade for a "large" country.
【多选题】隧道装渣运输按照装渣运输机具设备不同,可以分为 [填空(1)] [填空(2)] [填空(3)]
【单选题】金属支架是由以下部分组成 a 甲板、弦钉板、铁板杆筋 b 甲板、压弦条、铁板杆筋 c 弦轴板、弦枕、压弦条 d 弦码、铁板杆筋、弦枕
【单选题】An import tariff will cause the terms of trade of the ________ country to ________ and will ________ the country.
A.
importing; improve; benefit
B.
importing; improve; harm
C.
exporting; improve; benefit
D.
exporting; improve; harm
【简答题】隧道装渣运输按照装渣运输机具设备不同,可以分为[填空(1)][填空(2)][填空(3)]A. 有轨装渣-有轨运输B. 无轨装渣-无轨运输C. 无轨装渣-有轨运输