以天然气为原料小型合成氨装置（）的热量控制采用调节载热体流量的方法。
A.E-6
B.H-2
C.H-1
D.D-2h
参考答案：A
Henry speaks Chinese very well. He in China since 2002. [ ]
A. stays
B. stayed
C. is staying
D. has stayed
甲数除以乙数的商是0.75，甲乙两数的最简整数比是______．
