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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】腹部平坦，下列叙述正确的是（ ）
A.
前腹壁低于肋缘至耻骨联合的水平面
B.
前腹壁高于肋缘至耻骨联合的水平面
C.
前腹壁与肋缘至耻骨联合颊大致处于同—水平
D.
蛙状腹
E.
板状腹
【单选题】The Grand Canyon Standing on the rim of the Grand Canyon(大峡谷), gazing across this giant wound in the Earth’’s surface, a visitor might assume that the canyon had been caused by some ancient convulsion...
A.
it was caused by some ancient convulsion
B.
its presence is an embarrassment to the state of Colorado
C.
it looks like an injury on the Earth’s surface
D.
it has caused many visitors to injure themselves