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【多选题】
关于中央空调水系统的说法，下列哪些是正确的？（）A.
冷却效果相同时，多台冷却塔同步变频调节风机转速比冷却塔台数控制更节能
B.
水源热泵机组采用地下水或地面水，作为分散小型单元式机组的水源时，应采用板式换热器的间接供水方式
C.
在空调水系统中，定压点的最低压力应保证水系统最高点的压力高于大气压力4kPa
D.
热泵空调系统使用开式冷却塔时，应设置中间换热器
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【单选题】Eric：I‘d love to come to your barbecue on Saturday but my cousin is arriving from California that day． Sonia：That’s no problem．The more the merrier．I‘m glad__________．
A.
I can hold such a barbecue for you
B.
your cousin will be arriving from California then
C.
We finally have a chance to get together
D.
that you’re too busy to come to my barbecue
【单选题】I can think of nothing more ______ than arriving at the theater and discovering that I have left the tickets at home.
A.
vicious
B.
inviting
C.
vexatious
D.
immoral
【单选题】I was so late arriving at the airport that I______ had time to board the plane.
A.
nearly
B.
scarcely
C.
seldom
D.
justly
【单选题】I fear that I may create a bad ________by arriving late for the interview.
A.
information
B.
expression
C.
impression
D.
description
【单选题】如图所示,玻璃圆环 a 和金属圆环 b 都由丝线悬吊着,它们的几何轴线重合并且相互靠得较近,现将一条形磁棒的 S 极沿轴线靠近玻璃圆环 a ,则[ ]
A.
两环都向右移并互相靠近
B.
两环都向右移并互相分开
C.
a 环不动， b 环左移
D.
a 环不动， b 环右移
【单选题】Upon arriving home, I was surprised to find the paper I had had _____ was missing.
A.
to be prepared
B.
to prepare
C.
preparing
D.
prepared
【单选题】______ arriving at the spot, the policemen at once helped the passengers to safety.
A.
At
B.
On
C.
The moment
D.
As
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