碳素钢公称压力是指钢管及其附件等在介质温度为：（）A、200℃及以下时的工作压力 B

甲地的海拔高度为1500米，乙地的海拔高度为800米，两地的相对高度是（　　）

A．800米

B．1500米

C．2300米

D．700米

阅读表达 阅读短文，按要求完成短文后的各项任务。

Christmas is a season to spread joy. Can we spread this joy by caring a little more about nature and going green? Here are some good ideas.

Reduce the use of the decorative (装饰) lights. Make use of the eco-friendly（环保的）lights on the market. In this way you can save electricity.

Reuse the wrapping (包装) paper to wrap the gifts. You don’t need to buy new wrapping paper every year. Also try using the same small decorations for your Christmas tree.

Recycle (循环利用) all those decorations that your can not use any more. You can send out Christmas cards made from recycled paper. It’s a thoughtful way of going green for Christmas. (1)There are many charities selling these cards made from recycled paper.

There are some other ideal ways to go green for Christmas.

(2)You can make Christmas _________ by _________. You needn’t go shopping for your family and friends. Homemade Christmas chocolates, handmade soft toys, homemade candles are wonderful. There is a saying that goes, “It is the thought that counts.”

If you have no time for gifts, you can also invite your family and friends over to have a home cooked meal. They can even help you with the cooking. This can make your relationship stronger.

Let’s use these green Christmas ideas to celebrate an eco-friendly Christmas!

小题1:将（1）句译成中文。

小题2:在（2）句的空白处分别填入一个适当的词使句意完整、上下文通顺。

小题3:回答问题：Why do we use the eco-friendly lights for Christmas?

小题4:在文中找出与This can help improve your relationship.意思相近的句子，并将它写在答题卡上。

小题5:在文中找出最能表达该短文主题的句子，并将它写在答题卡上。

在社会主义市场经济体制下，我国国民经济规划按照法定程序经立法机构审议批准，但规划的基本性质仍是( )的。

A．法令性
B．指令性
C．指导性
D．行政性

女性，44岁，活动后心悸、气短、夜间阵发性呼吸困难、纳差、上腹饱胀、少尿、下肢水肿2个月余。体检示颈静脉怒张，双肺底闻细小湿啰音，心脏向两侧扩大，心率100次／分，律整，心尖部闻第三心音奔马律，可闻Ⅱ级收缩期杂音，肝大，肝颈静脉回流征（+），双下肢水肿（++），超声示左右心室扩大，弥漫性运动减弱，二尖瓣中度反流。最可能的诊断是（）

A.风湿性心脏病，二尖瓣关闭不全，全心衰竭

B.扩张型心肌病，全心衰竭

C.渗出性心包炎

D.风湿性心脏病，主动脉瓣关闭不全，全心衰竭

E.缩窄性心包炎

中修或长期封炉后，高炉送风开炉时炉前操作的关键是什么？