皮皮学，免费搜题
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【单选题】
单股人流宽度为550mm~700mm,建 筑规范对楼梯梯段宽度的限定是:住宅()。A.
≥1200mm
B.
≥1100mm
C.
≥1500mm
D.
≥1300mm
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皮皮学刷刷变学霸
举一反三
【单选题】以下程序片段,下列哪个选项插人到第2行将引起编译错误? ( ) package mypackage; //第二行 class MyClass{ //do something }
A.
public class MainClass{ }
B.
package mypackagea;
C.
class B{ }
D.
import java. util.* ;
【单选题】The evaporating pressure in R22 vapor compression refrigeration plant should be _____ atmospheric.
A.
below
B.
above
C.
equal to
D.
much larger than
【单选题】There is considerable pressure on teenagers to ______.
A.
follow
B.
behave
C.
conform
D.
confine
【单选题】Which will cause the high pressure cutout to stop the compressor in a R-22 system?
A.
Condenser leakage
B.
A shortage of liquid refrigerant
C.
Excessive frost on the evaporator
D.
Not enough condenser cooling water
【简答题】pressure [ˈpreʃə(r)]
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