碎石经试验其压碎值为14.5%，则该碎石可用于强度等级为≤C35的水泥混凝土施工。(

— Did you know any French before you arrived in Washington?

— Never ____ it, actually.

A．had I learned

B．have I learned

C．I learned

D．would I learn

（）由地面中性点直接接地的变压器或发电机直接向井下供电。

A、严禁

B、可以

C、必要是可以

流行性乙型脑炎病变最轻的部位是（）

A.脊髓

B.延髓

C.小脑

D.基底核

E.大脑皮质

The cash price consumers pay for a product is most likely to increase as the result of a:（）

A. government subsidy to product producers.

B. quota on how much of the product can be produced.

C. new law imposing high penalties for sales of the product.

任何单位和个人不得更改、伪造、变造（）、公路专用（）和（）。

A、通行卡

B、缴费卡

C、电子标签

D、储值卡