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【单选题】
下列有关物质性质、应用的说法中不正确的是
A.
Al 2 O 3 既能溶于NaOH溶液又能溶于HCl,说明Al 2 O 3 是两性氧化物
B.
浓硫酸能干燥SO 2 、NO 2 等气体,说明浓硫酸具有吸水性
C.
SO 2 气体具有漂白性,通入紫色石蕊溶液中能使溶液先变红后褪色
D.
石英的主要成分是SiO 2
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举一反三
【单选题】立井开拓是( )均利用垂直巷道由地面进入地下的开拓方式。
A.
主井
B.
副井
C.
主、副井
D.
采区上下山
【单选题】Every station platform is 1_________ (配备)with several assistance stations for emergency use. These cabinets include a direct 2__________ (电话)to the metro control center, a switch allowing the curren...
A.
fire equipment
B.
switch
C.
equipped
D.
track
E.
telephone
F.
stations
【简答题】程序的运行结果是: s = 0 for i in range(1,101): s += i else: print(1)
【单选题】Every station platform is 1_________ (配备)with several assistance stations for emergency use. These cabinets include a direct 2__________ (电话)to the metro control center, a switch allowing the curren...
A.
fire equipment
B.
switch
C.
equipped
D.
track
E.
telephone
F.
stations
【单选题】下列程序的运行结果是( )。 s=0:t=0:u=0 For x=1 To 3 For y=1 To x For z=y To 3 s=s+1 Next z t=t+1 Next y u=u+1 Next x Print stu
A.
3 6 14
B.
14 6 3
C.
14 3 6
D.
16 4 3
【单选题】Every station platform is 1_________ (配备)with several assistance stations for emergency use. These cabinets include a direct 2__________ (电话)to the metro control center, a switch allowing the curren...
A.
fire equipment
B.
switch
C.
equipped
D.
track
E.
telephone
F.
stations
【单选题】在物流冰山说中,费用占全部物流费用较少的部分指
A.
企业对外支付的物流费用
B.
沉于水面里的部分
C.
企业内部消耗的物流费用
D.
制造成本
【单选题】Every station platform is 1_________ (配备)with several assistance stations for emergency use. These cabinets include a direct 2__________ (电话)to the metro control center, a switch allowing the curren...
A.
fire equipment
B.
switch
C.
equipped
D.
track
E.
telephone
F.
stations
【单选题】Every station platform is 1_________ (配备)with several assistance stations for emergency use. These cabinets include a direct 2__________ (电话)to the metro control center, a switch allowing the curren...
A.
fire equipment
B.
switch
C.
equipped
D.
track
E.
telephone
F.
stations
【单选题】Every station platform is 1_________ (配备)with several assistance stations for emergency use. These cabinets include a direct 2__________ (电话)to the metro control center, a switch allowing the curren...
A.
fire equipment
B.
switch
C.
equipped
D.
track
E.
telephone
F.
stations
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