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【单选题】
尺寸为 200 mm × 200 mm × 200 mm 的某组混凝土试件,龄期 28d ,测得破坏荷载分别为 792kN 、 786kN 、660 kN ,该组试件的混凝土立方体抗压强度为( )。A.
20.6MPa
B.
21.6MPa
C.
22.6MPa
D.
23.6MPa
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【单选题】25岁初产妇,双胎妊娠,第一胎儿为单臀先露,娩出的新生儿2600g,Apgar评为8分。阴道检查知第二胎儿为肩先露,破膜后上肢脱出,胎心144次/分、有力规律。本例恰当的紧急处理应是
A.
给予子宫收缩剂
B.
行外转胎位术
C.
行内转胎位术
D.
行剖宫产术
E.
以上都不是
【单选题】Both bus and tree topologies are characterized by the use of multipoint (1).For the bus, all stations attach, through appropriate hardware (2) known as a tap, directly to a linear transmission medium,...
A.
tree
B.
bus
C.
star
D.
ring
【简答题】The bus is full and we can't ( ) any more passengers in.
【单选题】The bus is full and we can’t ________ any more passengers in.
A.
contribute
B.
original
C.
cram
D.
intake
E.
underestimate
【单选题】The bus is full and we can’t ________ any more passengers in.
A.
cram
B.
grab
C.
contribute
D.
worsen
【单选题】Both bus and tree topologies are characterized by the use of multipoint (1).For the bus, all stations attach, through appropriate hardware (2) known as a tap, directly to a linear transmission medium,...
A.
medium
B.
connection
C.
token
D.
resource
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