大城市中,工业用气与民用气的比例为( )。
A.6:4
B.7:3
C.(4:6)~(6:4)
D.(3:7)~(7:3)
参考答案:C
According to the United States Constitution, the legislative power is invested in()
A. the Federal Government
B. the Supreme Court
C. the Cabinet
D. the Congress
阿苯达唑()。
A.分子中有咪唑并噻唑结构
B.分子中有嘧啶结构
C.分子中有喹啉结构
D.分子中有过氧基结构
E.分子中含有硫原子