搜题请搜索小程序“爱下问搜题”
问题 单项选择题

程序排错是排除经测试发现出错的程序中错误的措施，其中测试排错法发现和排除错误的主要手段是利用______。

A．跟踪程序执行

B．测试实例比较

C．实现逻辑推断

D．路径径反向搜索

答案

参考答案：B

解析：
测试排错法主要是靠测试实例比较发现和排除错误。

单项选择题

某工地施工扬尘严重，市环保局接到群众举报并进行查实后，依法判其做出停工整改并处以3万元罚款的行政处罚，施工企业认为处罚过高，（）申请行政复议。

A.市环保局

B.省建设厅

C.市人民政府

D.省人民政府
查看答案
单项选择题

Why do airplanes take longer to fly west than east

It can take five hours to go west-east from New York(NY) to London but seven hours to travel east-west from London to NY. The reason for the difference is an atmospheric phenomenon known as the jet(喷射) stream. The jet stream is a very high altitude wind which always blows from the west to the east across the Atlantic. The planes moving at a constant air speed thus go faster in the west- east direction when they are moving with the wind than in the opposite direction.

2. What would happen if the gravity on Earth was suddenly turned off

Supposing we could magically turn off gravity. Would buildings and other structures (建筑物) float away What happened would depend on how ply the things were attached to the Earth, The Earth is moving at quite a speed, moving at over a thousand miles per hours. If you turn something around your head on a string(细绳) , it goes around in a circle until you let go of the string. Then it flies off in a straight line. ’ Switching off’ gravity would be like letting go of the string. Things not attached to the Earth would fly off in a straight line. People in buildings would suddenly shoot up-wards at a great speed until they hit the ceiling. Most things outside would fly off into space.

It can be inferred that without gravity（）.

A. buildings and other structures would float away

B. trees and buildings would not easily fly off

C. something around your head would not fly away

D. everything outside buildings would fly off into space
查看答案