硅是信息技术的关键材料。高温下四氯化硅与氢气反应可得到高纯度的硅，同时生成氯化氢．该反应的化学方程式为____．
硅是信息技术的关键材料。高温下四氯化硅与氢气反应可得到高纯度的硅，同时生成氯化氢．该反应的化学方程式为\_\_\_\_．
根据
Toronto’s third City Hall came into use in _____.
Toronto’s third City Hall came into use in \_\_\_\__.
Old city Hall was constructed in _____ years.
Old city Hall was constructed in \_\_\_\__ years.
The Third City Hall is now used as a _____.
The Third City Hall is now used as a \_\_\_\__.
Which of the following is the main idea of the passage?
Which of the following is the main idea of the passage?
（3分）配平下列氧化还原方程式：____+____+____=____+____+____+____
（3分）配平下列氧化还原方程式：\_\_\_\_+\_\_\_\_+\_\_\_\_=\_\_\_\_+\_\_\_\_+\_\_\_\_+\_\_\_\_
ETP hopes to finish this project in _____.
ETP hopes to finish this project in \_\_\_\__.
Why do American Indians protest against the construction of this pipeline?
Why do American Indians protest against the construction of this pipeline?
According to the passage, the workers can _____ in case of pipeline leaks.
According to the passage, the workers can \_\_\_\__ in case of pipeline leaks.
Neither Bill nor his parents _____ at home.
Neither Bill nor his parents \_\_\_\__ at home.