下列句子中加粗成语使用不恰当的一项是[ ] A．翘首西望，海面托着的就是披着银发

小明同学参加了其生活小区文明创建的活动。在活动中，小明发现小区存在以下问题：

①随地吐痰，乱扔垃圾现象时有发生。

②部分居民搓麻将赌博通宵达旦。

③浪费自来水现象严重，草地喷灌龙头任意排放。

④花园休闲椅损毁现象严重。

小明决定协助居委会解决上述问题。现请你帮助小明完成以下两件事情：

（1）针对上述问题，出一期墙报，将涉及初中《思想品德》中的哪些观点？

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（2）请你为居委会解决上述现象出谋划策。

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计算机采用二进制表示信息，下面说法不正确的是（）

A.是因为计算机只能识别0和1

B.技术上容易实现

C.运算规则简单

D.二进制数与十进制数之间容易转换

In the simplest form of international trade, the open-account basis, banks actually have only a simple transactions role. In the open-account basis, the importer and exporter are well known to each other and probably have established a successful working relationship. The importer orders goods and promptly pays for them when the goods and title thereto are received. Almost as simple is the foreign collection basis, in which a bank is used to transmit collected funds. Before the goods it has bought can be shipped, the importer must place funds with its bank so that the exporter is assured that payment will be made with collected funds. In this instance, the bank is merely an agent and not a lender.

The exporter has gotten the funds before he ships the goods in foreign collection.

A. Right

B. Wrong

C. Doesn’t say

一个虚拟存储系统由容量C₁=8MB的主存和容量C₂=800MB的辅存这两级存储器所构成。主存每位的平均代价P₁=10个单位成本，辅存每位的平均代价P₂=1个单位成本。相对CPU而言，从主存读出时间t_A1=500ns，从辅存读出时间t_A2=5ms。为了测定是否达到高的存取速率和低的位成本等，可以统计一组Benchmark程序，获得访问主存次数N₁=8×10⁹，访问辅存次数N₂=16×10⁶。

那么，本虚存系统的两级存储器的读出时间比γ= (1) ，每位平均代价p= (2) 单位成本，命中率H= (3) ，平均读出时间t_A= (4) μs。

（2）处填（）。

A．0.005

B．0.05

C．0.5

D．1.09

E．0.999

F．0.998

G．50.5

H．100.5