单选题
What is the main idea of this article?
Why mapping websites don’t work well.
Why mapping websites are better than paper maps.
How the first mapping website started.
How mapping websites work.
单选题
According to the article, MapQuest®______
started as an Internet company.
starting by selling paper maps.
started as maker of government databases.
uses millions of computers to read data.
单选题
When you search for directions, the first thing MapQuest® does is_______
estimate driving time.
consider how many turns you want to take.
look at all possible paths.
print out a map and directions.
单选题
When it’s deciding on the best route, MapQuest® probably chooses ________
city streets instead of freeways.
the route with the most turns.
dirt roads instead of paved roads.
freeways instead of dirt roads.
单选题
To estimate your driving time, MapQuest® considers _________
the speed limit for half of the route.
the fastest and slowest speed limits on your route.
the speed limits and types of turns on your route.
the distance between turns on your route.
单选题
位移法基本方程中的自由项
第i个附加约束中的约束反力
第j个附加约束中的约束反力
单选题
图示刚架在节点集中力偶作用下，弯矩图分布是（ ）
各杆都不产生弯矩
各杆都产生弯矩
仅AB杆产生弯矩
仅AB、BE杆产生弯矩
单选题
用位移法求解图示结构时，基本未知量的个数是（ ）
8
10
11
12
单选题
用位移法解超静定结构其基本未知量的数目（ ）
与结构的形式有关
与多余约束的数目有关
与结点数有关
与杆件数有关
单选题
图示结构位移法方程中的系数 k11 =（ ）
11
5
9
8
