—I’m very sorry, Allen. I can't find you

下列物质是同学们家里经常用到的，其中属于纯净物的是（　　）

A．100%汇源果汁

B．加碘盐

C．纯碱

D．白酒

男孩，2岁，胸骨左缘第3～4肋间闻及连续性杂音，肺动脉第二音增强，股动脉有枪击音，脉压差增大，最可能的是()

A．房间隔缺损

B．室间隔缺损

C．法洛四联症

D．急性心包炎

E．动脉导管未闭

特殊性能钢简称特类钢。

Woman: What do you like to do on your summer vacation

Man: I like nothing better than fishing on a hot summer day.

Question: What does the man mean().

A. He doesn’t like fishing on a hot summer day.

B. Although he likes fishing, he doesn’t want to do it on a hot summer day.

C. Fishing is his favorite pastime on a hot summer day.

D. He likes nothing, including fishing on a hot summer day.

我国计划要推出二板市场。最主要的原因是( )。

A．政府要扩大股市的规模

B．增加老百姓的投资渠道

C．发展直接融资，促进企业的改革和经营

D．支持高科技企业的发展