逆行肾盂造影的禁忌证是下列哪项（） A.碘过敏者 B.下尿路感染者 C.静脉尿路造影

阅读理解。

    Tomorrow is Mother's Day. Susan wants to give a present to her mother. Father tells her to go to the

shop and try to find something. Susan hurries (匆忙) to the shopping center (中心) and goes to the women's

store. She has ＄3.00. First she thinks she will get her mother something to wear. Then she thinks she will

buy something for her to use (使用).

    But she only has ＄3.00. She can't buy the nice dress. She sees a nice red hat (帽子). She knows her

mother will like it. But it is too expensive (贵的). It is ＄10.00.

    The saleslady looks at her and then looks at the hat. She takes off(取下) the price tag (标签) and says,

"That's exactly (恰好) ＄3.00."

1. Why does Susan want to give a present to her mother? [ ]

A. She loves her mother.

B. Her father asks her.

C. Tomorrow is Mother's Day.

D. She is a good girl.

2. Where does Susan go? [ ]

A. To the shop.

B. To a book shop.

C. To the women's store.

D. To the supermarket.

3. How much money does Susan have? [ ]

A. ＄3.00.

B. ＄10.00.

C. ￥3.00.

D. ￥10.00.

4. What is the price on the price tag? [ ]

A. ＄3.00.

B. ￥3.00.

C. ＄10.00.

D. ￥10.00.

5. Why doesn't Susan buy the dress? [ ]

A. She doesn't like it.

B. Her mother doesn't like it.

C. The dress is not beautiful.

D. She doesn't have much money (钱) with her.

承储中央储备粮的企业未对中央储备粮实行专仓储存、专人保管、专账记载，造成中央储备粮账账不符、账实不符的，应（）

A.由国家粮食行政管理部门责成中国储备粮管理总公司对其限期改正

B.情节严重的，对中央储备粮代储企业，取消代储资格

C.对直接负责的主管人员和其他直接责任人员给予警告直至开除的纪律处分

D.构成犯罪的，依法追究刑事责任

根据《电力建设安全生产监督管理办法》的规定，国家安全生产监督管理总局负责全国电力建设工程安全生产的监督管理工作。

以下关于改进信息系统性能的叙述中，正确的是：______。

A．将CPU时钟周期加快一倍，能使系统吞吐量增加一倍
B．一般情况下，增加磁盘容量可以明显缩短作业的平均CPU处理时间
C．如果事务处理平均响应时间长，首先应注意提高外围设备的性能
D．利用性能测试工具，可以找出程序中最花费运行时间的20%代码，再对这些代码进行优化

在Windows桌面上，不能启用“资源管理器”的操作是______。

A．用鼠标右键单击“开始”按钮，随后在其弹出的菜单中用鼠标左键单击“资源管理器”项
B．用鼠标左键单击“开始”按钮，在弹出的“系统菜单”的“程序”子菜单里单击“资源管理器”项
C．用鼠标右键单击“我的电脑”图标，随后在其弹出的菜单中用鼠标左键单击“资源管理器”项
D．在“我的电脑”窗口中双击“资源管理器”