我国发明专利的保护期为()年,期限自专利申请日算起。
A.10
B.20
C.30
D.50
参考答案:B
随着我国城乡居民人均可支配收入的增加,一直被视为高档耐用消费品的轿车正悄然走进寻常百姓家。这说明[ ]
A、收入是消费的基础和前提
B、消费拉动经济增长
C、物价水平影响人们的购买力
D、生产与消费互相影响
In learning a foreign language, ______ English, one should first pay attention to speaking, which is the groundwork of reading and writing.
A.says
B.say
C.to say
D.saying