一名中等身材的初中同学和旁边的木箱在烂泥地上的情况如图所示，_爱下问搜题

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问题选择题

一名中等身材的初中同学和旁边的木箱在烂泥地上的情况如图所示，若他一只鞋底的面积为200cm²，通过观察图中的情形，你估计木箱对地面的压强约：

[ ]

A．12500Pa

B．250000Pa

C．1250Pa

D．2500Pa

答案

答案：A

题目分析：

解：他对地面的压强就等于木箱对地面的压强P=F/S =500N/2×200×10⁻⁴m2 =12500Pa．

故选A．

完形填空

Get Yourself Lost
Travelers to new cities are often told to start their trip with a bus tour. The thinking is that they can then ____1____ to the places that interested them. Nonsense! What you see from the____2____ of a moving bus is unreal and completely removed from the authentic sights, sounds and ____3____ outside.
Be adventurous! The best way to experience any place is ____4____ and with absolutely no travel ____5____. Simply go wherever your feet and your ____6____ lead you. You eventually will get to the same sites that are on the bus tour - the museums, the monuments city hall- but will have ____7____ much more. You will have felt the contemporary life of the city.
“But what if I get lost?” People might ask. No one gets ____8____ lost in a major city. Eventually, you can find your way back to a well-known location. If it frightens you to be “lost”, just find a taxi and go back to where you____9____. However, the nicest things can happen if you get lost. You stop at a sidewalk café to ____10____ and relax. You ask instructions of the local people at the ____11____ table. And even if they don’t speak your language, your trip becomes more ____12____ because of the experience.
So next time you see a poster advertising an introductory bus tour, ____13____ your money. Instead, wander on your own. I ____15____ you a time you’ll remember with great pleasure.

A．uncertainly

A．forgettable

D．Take it easy

单项选择题

关于正常肾上腺的声像图，叙述错误的是（）

A.新生儿肾上腺约为肾的1/3大小

B.正常肾上腺超声显示率左侧低于右侧

C.成人肾上腺约为肾的1/13大小

D.新生儿肾上腺部位表浅，周围缺乏脂肪

E.肾上腺的血供差