负压区泄漏将使汽化率（）干熄炉处理量。
A、上升、上升
B、下降、下降
C、上升、下降
D、下降、上升
参考答案：C
纤维素、纤维素酶、纤维素酶基因的基本组成单位依次是[ ]
A．葡萄糖、葡萄糖和氨基酸
B．葡萄糖、氨基酸和脱氧核苷酸
C．氨基酸、氨基酸和脱氧核苷酸
D．淀粉、蛋白质和DNA
The world’s population has grown by ______ it was in 1800.
A．more than six times that
B．six times more than that
C．more than six times what
D．six times as many as
