流行性乙型脑炎死亡的主要原因为
A．高热、昏迷B．缺氧C．中枢性呼吸衰竭D．低钠性脑病E．外周性呼吸衰竭
参考答案：C
The twins have studied in this school .
A．two years ago
B．since two years ago
C．for two yeas ago
D．since two years
打开一个已有项目文件的命令是______。
A．OPEN PROJECT
B．MODIFY PROJECT
C．USE PROJECT
D．EDIT PROJECT
