简述晴雯之死的原因。

—Have you graduated from college?

—Yes, ________.

A．I studied French for two years.

B．I have been studying French.

C．I have studied French for two years.

D．I had studied French for two years.

每年六、七月间，太阳直射点在地球上移动的规律是[ ]

A、先向北移，后向南移

B、一直向北移

C、先向南移，后向北移

D、一直向南移

宠物医院的体重秤需要经常消毒吗？（）

A、不需要

B、需要经常消毒

C、消毒最好，不消毒也无所谓

D、不能经常消毒

列举性心理异常的类型。

根据项目的总体目标和阶段性目标，将项目的最终成果和阶段性成果进行分解，列出达到这些目标所需的软件是______。

A．结构
B．设施
C．设备
D．信息资料