北沙参的别名是
A．紫河车 B．草河车 C．空沙参 D．东沙参 E．潞党参
参考答案：D
解析：北沙参的别名是辽沙参、东沙参。故答案是D。
Mr. Liu dreamed ____ a big house for his parents after they retire.
A．to buy
B．to buying
C．of buying
D．of being buying
蜃景一般出现在海滨与沙漠地区，（）蜃景出现次数最多。
A.甘肃敦煌
B.辽宁大连
C.山东蓬莱
D.海南三亚
