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【单选题】
下列关于H 3 PO 4 、H 3 PO 3 及H 3 PO 2 的论述中,错误的是A.
依次可以用(HO) 3 PO、(HO) 2 PO、HOPO代表分子式
B.
酸性H 3 PO 4 > H 3 PO 3 > H 3 PO 2
C.
它们分别是三元酸、二元酸、一元酸
D.
分子中磷原子都是四配位
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【单选题】Which is the right order in which the author visited places of interest?
A.
1,000 Islet Lake, Paper Factory ,Tea Museum, and then Silk Museum.
B.
Paper Factory,1,000 Islet Lake, Silk Museum, and then Tea Museum.
C.
Tea Museum, Silk Museum,1,000 lslet Lake, and then Paper Factory.
D.
Silk Museum, Paper Factory, Tea Museum, and then 1,000Islet Lake.
【简答题】A．The author's profession. B．The number of the vehicle. C．Where they visited. D．How they managed to go home.
【单选题】When the author visited Laura in the hospital, Laura _________.
A.
hinted to her that she was going to commit suicide
B.
complained to her about the cruelty with which she was treated
C.
was suffering a physical pain that was beyond her endurance
D.
tried hard to appear happy in front of her to please her
【单选题】The author visited Australia__________
A.
to study Australian farming methods
B.
to investigate how the fence was constructed
C.
because he was interested in life around the fence
D.
because he wanted to learn more about the wool industry
【简答题】The author wrote about the people and places which he had visited.
【简答题】If we had known his address, we (visit) ______ him.
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