工作面液压支架（柱）的工作特征是（）式的。A、微增阻 B、急增阻 C、恒阻 D、刚性

句型转换。

1. He has worked in Beijing for a year. (就划线部分提问)

    ______ ______ ______ he worked in Beijing?

2. We started to learn about the moon since over 40 years. (改为同义句)

    We ______ ______ about the moon ______ over ______ years.

3. My brother has had his job since 2011. (就划线部分提问)

    ______ ______ ______ your brother had his job?

4. Learning a foreign language is fun. (改为同义句)

    ______ ______ ______ learn a foreign language.

5. The best way to learn English well is to practice more. (就划线部分提问)

    ______ the best way to learn English well?

读“江苏省和宁夏回族自治区水资源利用情况对照表”，下列说法正确的是

A、宁夏的用水总量超过江苏

B、宁夏的人均用水量超过江苏是因为宁夏人口密度小，是以灌溉农业为主的产业结构

C、两省区生活用水比重均大于生产用水比重

D、宁夏的农田灌溉亩均用水量大大超过江苏，造成这种差异的最主要自然因素是农作物类型

They（）the flood after a heroic fight lasting five days and four nights.

A.conquered

B.combated

C.won

D.withdrew

脉动磁场

为保证债券交易的结算秩序，中央结算公司为银行间市场成员之间的债券交易提供以下四种结算方式：（）、（）、（）、（）。