隧道净空收敛一般采用的监测方法是（） A.收敛计 B.测斜管 C.铟钢尺 D.应变计

（3分）通过学习化学，我们知道氧气能使带火星的木条复燃，那么能使带火星的木条复燃的是否一定是纯氧呢？为了弄清这个问题，才仕实验学校化学小组进行了如下探究：

①取5个大小相同的集气瓶，分别编为1、2、3、4、5号，并分别使瓶内留有占集气瓶容积10%、20%、30%、40%、50%的水（余下为空气），用玻璃片盖住并倒扣在装有水的水槽中。

②分别用排水法向上述5个瓶子中通入氧气，小心地把5个瓶内的水排完后，用玻璃片盖住瓶口，取出正放好。

③将带火星的木条伸入5个瓶中，观察到的现象如下：

编号	1	2	3	4	5
现象	微亮	亮	很亮	复燃	复燃

 请你参与探究，回答下列问题：

（1）从观察到的现象可知,使带火星的木条复燃所需氧气的最小体积分数介于     号瓶与      号瓶之间。 

（2）用排水法收集满氧气后，4号瓶中氧气的体积分数约为      ； 

（提示：空气中氧气的体积分数约为21%）

（3）若要得到更准确的体积分数范围，只要调整①步骤中集气瓶内水的体积，并重复上述实验即可，你认为调整后瓶内水占集气瓶容积的体积分数为            。

下面对牙齿面横嵴的解释，正确的是（）。

A.颊尖和舌尖的两条三角嵴横过面横行相连

B.面两个三角嵴横向相连

C.牙冠上两嵴横向相连

D.前牙舌侧横行条状隆起

E.在牙体上颊舌相连的嵴

阅读理解。

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项.选项中有两项为多余项。

    Does this situation seem familiar to you? Your English is progressing well, the grammar is now

familiar, the reading comprehension is no problem, and you are speaking quite fluently.  1  

    First of all, remember that you are not alone. Listening is probably the most difficult job for almost

all learners of English as a foreign language.   2  what you need to do is to find listening resources. The

Internet is really a useful tool for English students. You can download The RealPlayer from RealMedia.

com. The Real Player allows you to use the Internet like a radio station.

    Once you have begun to listen on a regular basis, you might still be frustrated(受阻)by limited

understanding  3  

    Here is some of the advice I give my students:

    Accept the fact that you are not going to understand everything.

    Stay relaxed when you do not understand, and try listening to the material for more times.

    Do not translate everything into your native language .

      4  Don't concentrate on detail until you have understood the main ideas.

    Listen to something you enjoy.

    I remember the problems I had in understanding spoken German when I first went to Germany. In

the beginning, when I didn't understand a word, I insisted on translating it in my mind.   5  Then, after

the first six months, I discovered two extremely important facts; Firstly, translating creates a barrier

between the listener and the speaker. Secondly, most people repeat themselves constantly. By remaining

calm, I noticed that even if I didn't pay much attention I could usually understand what the speaker had

said.

    A. What should you do?

    B. But listening is a problem for most of the beginners!

    C. However, after several weeks, I got used to the grammar rules

    D. The most important thing is to listen as often as possible.

    E. This method usually resulted in confusion.

    F. Listen for the general idea of the conversation.

    G. But you can't follow a native English speaker at all!

任务型读写。 请认真阅读下面短文，并根据所读内容在文章后表格中的空白里填入最恰当的单词。 注意：每空一词

There are a number of advantages when it comes to living alone. However, it also comes with a few safety concerns. You still never know who will be around the corner. Don't become another victim; be sure to follow our tips.      1. All doors should be kept locked.      Always keep your doors locked when you are in your apartment or dorm. Make sure the doors are closed behind you when you come into the building and never leave your room unlocked, even when you are in it. There's always a chance that someone might sneak in while you are unaware. Always try to remember to close doors behind you to ensure your safety.      2. Don't lose your keys.      Even if you do everything you can to keep the doors locked, criminals might still be able to come into your house with a key. Always know where your keys are to prevent this. Never put them down in a public place or give them to friends. Also, before you bring your car into the repair shop, take off the house keys.      3. When it comes to safety, standing up for yourself is important.      If you aren't getting all the security features you want, don't be afraid to ask. If your lighting situation is less than ideal, discuss this with your supervisor or landlord. Talk to the campus security organization if you think a security phone near your dorm is a good idea. Request that the building employ someone to monitor those entering and leaving the building. You should feel safe where you reside (居住于), so stand up for your rights.      4. Be careful.      You still might find yourself in a potentially dangerous situation. Check your peephole (窥视孔) before letting anyone in. Whenever you witness something around your building that makes you uncomfortable or suspicious just dial 911. It is a good idea to always walk with a friend instead of alone. Become familiar with people who live in the building, so you can keep track of anyone that is a stranger.

1.  ____   to  follow when living alone Leave your doors 2.        as soon as you come into the building so that someone is not able to sneak in. Never lose your 3.         or give them to others. 4.            up for your rights: l Discuss this with your supervisor or landlord if you are not 5.       with your lighting situation. l Request the building to have someone 6.         to monitor those entering and leaving the building. l Ask the campus security organization to fix a 7.        near your dorm. Being careful l Dial 911 when you find something uncomfortable or 8.      . l When walking, keep your friends in 9.        instead of alone. l Be familiar with people in the neighborhood so that you will pay attention to 10.         .

从动机与行为的关系上分析，动机的特征有（）。

A.启动性

B.方向性

C.强度

D.方便性

E.实用性