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问题 选择题

下列离子方程式正确的是 [ ]

A．铁与稀硝酸反应：Fe＋2H+=Fe2+＋H2↑

B．小苏打与氢氧化钠溶液混合：HCO3-＋OH-=CO2↑＋H2O

C．氯化钙与碳酸氢钾溶液混合：Ca2+＋CO32-=CaCO3↓

D．CuSO4溶液与Ba(OH)2溶液混合：Cu2+＋SO42-＋2OH-＋Ba2+=BaSO4↓＋Cu(OH)2↓

答案

答案：D

选择题

The toddler who miraculously ______ a fall from her 10th-floor home in Hangzhou, east China, ______ recovering quickly.

A．is survived, is

B．are survived, are

C．survived, is

D．being survived, are
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选择题

— Could you come back home for dinner?

— ______. I'll be at a very important business meeting at that time. [ ]

A. I think so

B. Yes, I hope so

C. I'm afraid not

D. I'm afraid so

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