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【单选题】
以下说法不正确的是A.
沿短轴图上贲门的食管端向左可找到胃底
B.
胃窦中央部胃腔回声较弱，周边部肌层回声较强
C.
正常胃壁厚度为3～5mm
D.
胃体前后壁黏膜形成粗强的回声带，即胃腔
E.
空腹胃底回声为脾门旁内侧的弧形含气强回声带
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举一反三
【单选题】When we got to the station, the train .
A.
will have left
B.
left
C.
has left
D.
had left
【单选题】When we got to the scene of the incident, we found that the police were firing shots and using teargas to______the crowd that had gathered around the building.
A.
dispose
B.
dislocate
C.
disintegrate
D.
disperse
【单选题】有一外径为18mm的无缝钢管，管内通冷冻盐水，为减少冷量损失，在管外包一层热导率λ=0.18W/(m·℃)的石棉，保温层外壁与空气对流给热系数α=10W/(m2·℃),比较石棉厚为5mm和8mm时的冷量损失（）*
A.
5mm时损失较大
B.
8mm时损失较大
C.
一样大
D.
不确定
【单选题】有一外径为18mm的无缝钢管，管内通冷冻盐水，为减少冷量损失，在管外包一层热导率λ=0.18W/(m·℃)的石棉，保温层外壁与空气对流给热系数α=10W/(m2·℃),比较石棉厚为5mm和8mm时的冷量损失（）*
A.
5mm 时热损失较大
B.
8mm 时热损失较大
C.
一样大
D.
不好说
【单选题】The sun when we got to the top of the mountain.
A.
had risen
B.
raised
C.
had raised
D.
rose
【单选题】有一外径为18mm的无缝钢管,管内通冷冻盐水,为减少冷量损失,在管外包一层导热系数 λ =0.18W/(m · °C )的石棉,保温层外壁与空气对流给热系数 α =10W/(m2 · °C ),比较石棉厚为5mm和8mm时的冷量损失()
A.
5mm时损失较大
B.
8mm时损失较大
C.
一样大
D.
不好说
【单选题】What a pity! When we got to the cinema，the movie The Assembly ，so we saw only the end of it．
A.
had just finished
B.
was finishing
C.
would finish
D.
just finished
【单选题】The plane ________ when we got to the airport. The plane ________ when we got to the airport. A . had taken off B . was taken off C . will take off D . is taking off
A.
had taken off
B.
was taken off
C.
will take off
D.
is taking off
【单选题】有一外径为18mm的无缝钢管，管内通冷冻盐水，为减少冷量损失，在管外包一层热导率λ=0.18W/(m·℃)的石棉，保温层外壁与空气对流给热系数α=10W/(m2·℃),比较石棉厚为5mm和8mm时的冷量损失（）*
A.
8mm 时热损失较大
B.
5mm 时热损失较大
C.
一样大
D.
不好说
【单选题】The train when we got to the station.
A.
has just left
B.
had just left
C.
leaves
D.
left
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