干灰砂配制工艺流程主要由原料砂输送装置、干燥系统、（）、配制

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问题单项选择题

干灰砂配制工艺流程主要由原料砂输送装置、干燥系统、（）、配制系统和提升系统5个系统来完成。

A.链板输送装置

B.沸腾压力输送系统

C.远红外加热装置

D.电气控制柜

答案

参考答案：B

填空题

单词拼写

根据下列句子及所给汉语注释, 在句子右边的横线上写出空缺处各单词的正确形式。

(每空只写- 个词)

1·. It's believed that the ancient town is (值得)a visit.

2. He was very upset but (恢复)himself in time to make a speech.

3. I'd like to buy the products that are (登广告)in the newspaper.

4. He prefers to live a (平静)life in the countryside.

5. Farmers hunted the endangered animals without (怜悯).

6. Young children often have difficulty in (表达)themselves.

7. How much did he (收费)you for repairing the bicycle?

8. Would you like to pay your coat in (现金)or by cheque?

9. She greeted them by their first names in a (熟悉的)way.

10. He is always helping others and his teachers think (高度)of him.

选择题

某同学通过实验比较四种金属的活动性大小．他取等质量的金属粉末分别与足量的等质量分数的稀盐酸反应，实验结果记录在下表．由此得出的实验结论正确的是（　　）

A．W是最不活泼的金属

B．四种金属的活动性顺序为X＞Z＞W＞Y

C．Y一定是铜

D．在单位时间内，产生的气体量由多到少的顺序为X＞Y＞Z＞W