安全型依恋约占婴儿的（）。
A.50~55%
B.55~60%
C.60~65%
D.65~70%
参考答案：D
The moment he came into his room, he ______ something wrong, though he couldn’t tell.
A．noticed
B．sensed
C．felt
D．smelt
脑动脉瘤的体积是决定SAH是否出血的危险因素，出血机会较少的是瘤体直径小于：（）
A.1mm
B.2mm
C.3mm
D.4mm
