该病例诊断为
A．阿尔茨海默病
B．额颞痴呆
C．pick病
D．路易体痴呆
E．血管性痴呆
参考答案：E
使用于A319-112/115型飞机的手提式氧气瓶，放瓶体充满氧气后，容量为（）立升。
He _____ in the classroom just now. he _____ be there now. [ ]
A. heard to sing, may
B. was heard sing, must
C. heard sing, must
D. was heard to sing, may
