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问题 选择题

“NaCl+CO2+NH3+H2O==NaHCO3↓+NH4Cl”是著名的“侯氏制碱法”的重要反应之一。以下对该反应的部分见解正确的是[ ]

A. 该反应为化合反应

B. NaHCO3不属于盐

C. 反应物中只有一种氧化物

D. 该反应可获得氮肥

答案

答案：D

选择题

Don't worry about him. After all, he is a ______ boy. [ ]

A. seventeen years old

B. seventeen-years-old

C. seventeen-year-old

D. seventeen-year-olds

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选择题

______ I have made great progress in my spoken English, I can not express myself freely.

A．In spite of

B．Even though

C．As though

D．Despite
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