硬件系统维护工作包括定期保养性维护和（）两大类。A.系统软件升级 B.与硬件厂商研讨

房地产投资相对于股票投资，往往具有较低的收益水平。()

下面的句子中每句都有两个错别字，把它们找出来改正。

①月亮还在竹莲儿上爬，那满圆却慢慢又亏了，末了，便全没了终迹，只留下一个空镜，一个失望。

②我突然觉得，我们有了月亮，那无边无迹的天空也是我们的了，那月亮不是我们按在天空上的映章吗？

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根据短文内容，从下面方框中选择适当的短语填空，使短文内容完整正确，并将答案填写在答题卡相应位置上。

Mike was alone at home last year, because his parents were always busy working in other cities. He    小题1:    , so he often turned on the TV and watched different programs. However, these programs     小题2:    him. He had lost himself in them.    小题3:   , he spent little time on his study. Luckily, his mother realized his problem     小题4:   . She talked about it with his teacher and decided to come back to Nanjing. Mike was very glad to live with his mother. So far, he has 小题5:  in his study. He believes he can catch up with his classmates soon.

一般情况下，中央银行采取紧缩的货币政策将导致( )。

A．股价水平上升
B．股价水平下降
C．股价水平不变
D．股价水平盘整

肿瘤内常有钙化的神经胶质瘤是（）

A.星形细胞瘤

B.室管膜瘤

C.少突胶质细胞瘤

D.髓母细胞瘤

E.多形性胶质母细胞瘤