亚洲气候的特点是： [ ]
A．复杂多样
B．以热带为主
C．海洋性显著
D．东西差异明显
答案：A
It is believed that this stamp is________; all others like it have been lost or destroyed. [ ]
A. unique
B. vague
C. potential
D. arbitrary
新生儿期的定义是
A．出生至满月
B．出生至30天
C．出生至满28天
D．从脐带结扎至28天
E．从脐带结扎至生后28天内
