按照国家有关法规，对联合国所属在华机构的自用车辆，免征（）A、公路养路费 B、公路养

A warm welcome ______ to the American guests at the airport tomorrow morning.

A．is given

B．has been given

C．is going to give

D．will be given

29．—The cleaning must have taken you quite a long time yesterday．

—Right．The rooms ______ for two months．

A．haven't been cleaned

B．didn't clean

C．hadn't been cleaned

D．hadn't cleaned

与《素问.调经论》所说“有余则笑不休”、“不足则悲”相关的是

A．心气

B．宗气

C．心阴

D．心神

E．心阳

HIV主要感染下列哪种细胞（）。

A.CD4+淋巴细胞

B.B淋巴细胞

C.单核细胞

D.神经胶质细胞

E.皮肤上皮细胞

在Visual FoxPro中，要运行查询文件query1.qpr，可以使用命令

A．DO query1

B．DO query1.qpr

C．DO QUERY query1

D．RUN query1