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【单选题】
在固定床列反应器中, 工业上常采用的 降低热点温度减小轴向温差措施不包括以下哪一项A.
在原料气中加入微量的抑制剂，使催化剂部分毒化，减缓反应程度
B.
再装入催化剂的列管上层装填惰性填料（铝粒或废旧触媒），以降低入口处附近的反应速率，从而降低反应防热速率，使之与除热速率尽可能平衡
C.
采用分段冷却法，改变除热速率， 避开操作敏感区
D.
调整反应器换热面积，快速移走反应热
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【简答题】What were the contents of the New Deal?
【简答题】下列不属于计算机的外部存储器的是 (
)A. 软盘 B. 硬盘 C. 内存条 D. 光盘
【简答题】不属于计算机的外部存储器的是( )。
【单选题】Police ______ the crowds with teargas, and tanks were stationed in the city.
A.
removed
B.
showered
C.
detached
D.
dispersed
【简答题】A．The caravan was burned. B．The windows of the bank were blown out. C．The contents of the caravan were damaged. D．Damage inside the vehicle was very serious.
【单选题】The large crowds lingering in the streets were quickly ______ by heavy rain.
A.
removed
B.
showered
C.
detached
D.
dispersed
【单选题】What kinds of products were sold in this shop?
A.
goods
B.
services
C.
machines
D.
contents
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