上海的发展日新月异,不久前国内首座开启式旋转景观桥在北外滩建成。该桥长约22米,

题型:填空题

问题:

上海的发展日新月异,不久前国内首座开启式旋转景观桥在北外滩建成。该桥长约22米,一辆摩托车以10 米/秒的速度沿直线匀速通过此桥,需_________秒 ;以桥为参照物,摩托车是_________ 的(选填“静止”或“运动”)。在行驶过程中,摩托车的动能_________(选填“减少”、“不变”或“增加”)。

考点:速度公式及其应用动能大小的比较运动和静止的相对性
题型:填空题

It's very ____________ in summer in Nanjing. [ ]

A. cold

B. cool

C. hot

题型:填空题

根据短文内容及首字母提示,填写所缺单词。

     Advertisements are everywhere! They're on the (1)r_______  and TV, in newspapers and magazines

on buses and buildings. They're on websites and mobile phones. Companies (2)g_______ their products to

film stars, pop stars and sports stars to (3)u_______ so that fans will buy them in order to copy the stars.

     Advertisements have become so common (常见的) that they aren't (4)w_______any more. We don't like

advertisements. so we try not to see them. We turn (5)o_______ the advertisements on computers. We refuse (拒绝) to watch them on TV, or read them in magazines. We no longer pay attention to the posters all around

us. We don't copy the stars (6)b_______ we know they don't really like the things they advertise.

     This means that advertising companies need a new (7)w_______ to sell. They can't make their products

"cool" by advertising. Advertisements aren't cool,and teenagers won't buy the things in advertisements

(8)i_______because the advertisements say they are fashionable. The latest way to advertise is not to advertise.

     (9)I_______ of using stars,companies are using teenagers. They pay them to tell their friends about new

products. Teenagers don't want to dress like everyone else and buy the things that everyone else has. They

want to look (10)d_______ and create their own style. Teenagers don't think it's cool to copy the stars or buy

things they've seen in advertisements.

题型:填空题

牙膏中的甘油是()

A.摩擦剂

B.发泡剂

C.润湿剂

D.胶黏剂

E.防腐剂

题型:填空题
不定项选择
图为X射线管的结构示意图,E为灯丝电源,要使射线管发出X射线,须在K、A两电极间加上几万伏的直流高压(   )
A.高压电源正极应接在P点,X 射线从K 极发出    

B.高压电源正极应接在P点,X射线从A极发出    

C.高压电源正极应接在Q点,X射线从K极发出    

D.高压电源正极应接在Q点,X射线从A极发出

题型:填空题

老年人发生机械性肠梗阻时,首先应想到()。

A.蛔虫团所致的肠梗阻

B.粘连所致的肠梗阻

C.嵌顿性腹外疝

D.肿瘤

E.小肠扭转

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