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问题
单项选择题
左右肾纵轴与脊柱各形成一向下的角度约为()。
A.10°
B.15°
C.20°
D.25°
E.30°
答案
参考答案:
B
选择题
Pisa is a city, ____ has a leaning tower.
Pisa is a city, ____ there is a leaning tower.
A. which, where
B. that, which
C. where, which
D. there, where
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判断题
三台以上带式输送机串接运行时,应设连锁装置。
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