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举一反三
【单选题】胎儿脐带的超声图像特征是：①一端连接胎盘，一端连接胎儿脐部；②横切呈“品”形；③纵切呈麻花样；④多普勒超声显示1条脐静脉和2条脐动脉()
A.
①②③
B.
①③
C.
②④
D.
④
E.
①②③④
【单选题】CIf you are a fruit grower — or would like to become one —take advantage of Apple Day to seewhat’s around. It’s called Apple Day but in practice it’s more like AppleMonth. The day itself is on October...
A.
Attend experts’lectures
B.
Visit fruit-loving families
C.
Plantfruit trees inan orchard
D.
Tastemanykinds ofapples
【多选题】麻花的能量为525kcal／100g，10岁男孩每日能量推荐摄入量是2100kcal，麻花的硫胺素为0．05mg／100g，10岁男孩每日硫胺素的RNI是0．9mg，经计算，麻花的能量密度和INQ分别为（ ）。
A.
0．15
B.
0．25
C.
0．224
D.
0．056
E.
0．20%