美英军队在()西北部的诺曼底地区对德军进行登陆战役。
A.法国
B.德国
C.荷兰
D.比利时
参考答案:A
颈内动脉血流频谱形态为()
A.低阻力频谱
B.高阻力频谱
C.舒张期三峰频谱
D.宽频毛刺样频谱
E.窄频三峰递减型频谱
—She was late for the party.
—That's () she had forgotten the exact time.
A. why
B. how
C. because
D. whether