轻便摩托车在非机动车道内行驶的行为可以认定为（）。A、机动车不按规定车道行驶B、机动

阅读理解。

       The United States has many different kinds of climates. On the northwest coast, the temperature

  changes very little between summer and winter, but the north central states have a very different kind of

  climate. In those states, people wear light clothes in summer, and they need heavy woolen clothes in

  winter.

       In the southwest coast, the climate is rainy and warm during the winter, but the summer is dry and hot.

       In the northeast of the United States, summer temperature's are very different from winter

  temperatures. Summer is usually hot, and winter is usually cold. Spring temperatures are warm, and fall

  temperatures arc cool.

       Years ago, people in the cold parts of the United States didn't often get fresh vegetables and fresh

  fruits during the summer. Today, however, trucks and trains carry fruits and vegetables very quickly to all

   parts of the United States. In this way, Americans "send their climates"to people in other states.

1. The summer and winter temperatures are almost the same _____. 

A. in the northeastern states

B. on the north central states

C. in the western states

D. on the northwest coast

2. The word "fall" in this passage means "_____".

A. drop                    

B. down

C. autumn                  

D. spring              

3. Today people _____ can get fresh vegetables and fruits.

A. in the north central states

B. in every part of the USA

C. in the cold parts of the USA

D. in the southwest part of the USA

4. From this passage we know that the climate of the United States _____.

A. is always very cold

B. is warm in winter

C. is widely different

D. changes very little between summer and winter

5. From Paragraph 2 we know that the climate of the southwest coast is _____.     

A. Maritime (海洋性) climate

B. Savanna (热带草原) climate

C. Mediterranean (地中海) climate

D. Tropical rainforest (热带雨林) climate

在下列溶液中，各组离子一定能够大量共存的是 [ ]

A．使酚酞试液变红的溶液： Na⁺、Cl^-、SO₄^2-、Fe³⁺

B．使紫色石蕊试液变红的溶液：Fe²⁺、Mg²⁺、NO₃^-、Cl^-

C．c(H⁺)=10^-12 mol·L^-1的溶液：K⁺、Ba²⁺、Cl^-、Br^-

D．碳酸氢钠溶液：K⁺、SO₄^2-、Cl^-、H⁺

化学平衡可逆反应平衡时，物系中各物质的保持不变（）。

A、温度

B、浓度

C、分压

D、热量

与下颌管关系密切的牙齿是

A．下颌第一前磨牙

B．下颌第二前磨牙

C．下颌第一磨牙

D．下颌第二磨牙

E．下颌第三磨牙

字长为7位的无符号二进制整数能表示的十进制整数的数值范围是______。

A) 0～128
B) 0～255
C) 0～127
D) 1～127