房水排出的主要途径()。
A.脉络膜上腔
B.视网膜
C.睫状体上皮
D.虹膜血管
E.前房角小梁网
参考答案:E
Being Life’s ____ only black photographer put him in _____ unusual position when Parks set out to cover the civil rights movement.
A.the; an
B.不填; the
C.the; the
D.不填; an
清代檐椽与飞檐椽的常规比是()。
A.1:2
B.1:3
C.2:1
D.3:1