A:2:3
B:1:1
C:3:2
D:3:4
我国第一部纪传体通史是《____》;我国第一部编年体通史是《____》。
一个人一次失血不超过体内血的( ),短期内可以恢复正常。
4.5﹣1.8=( )
王刚同学的居住地有一口井,每年只有一天有阳光直射井底的现象,王刚同学有可能住在下列哪些省份( )
—I am really struck by your spoken English. You speak so fluently. Have you been abroad?
—Yes. I ______ in London for two years.