皮皮学，免费搜题
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【多选题】
下列系统中，属于空间数据库应用系统的是：A.
校成绩查询系统
B.
公交换乘系统
C.
城市基础部件普查系统
D.
校园导航系统
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】. With their son ______ a foreign college now, the parents have some financial problems now and then.
A.
to attend
B.
attending
C.
attended
D.
having attended
【单选题】College loans are now much harder to obtain. _________, most college students must work at least part time.
A.
Furthermore
B.
Similarly
C.
Consequently
D.
However
【单选题】Most college students think it ___ suitable jobs now.
A.
difficulty in finding
B.
difficult in finding
C.
difficulty to find
D.
difficult to find
【单选题】When I was at college , I _____ two foreign languages but I _____ most now ..
A.
learnt; had forgotten
B.
learnt ; have forgotten
C.
have learnt ; forgot D have learnt ; have forgotten
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