明代戎马一生的常胜 * * 、被称为“三朝虎臣”民族英雄是谁？（） A.郑成功 B.戚继光

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选项.

     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. The most important thing is to listen as often as possible. _ 2  

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

RealMedia.com. The RealPlayer 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 details before 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. This method usually

resulted in confusion.   5   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.But you can't follow a native English speaker at all!

B.What should you do?

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

D.However, after several weeks, I got used to the new environment in Germany.

E.So, what you need to do is to find listening resources.

F.Then, after the first six months, I discovered two extremely important facts.

G.Listen for the general idea of the conversation.

如图所示的木板由倾斜部分和水平部分组成，两部分之间由一段圆弧面相连接，在木板的中间有位于竖直面内的光滑圆槽轨道，斜面的倾角为θ。现有10个质量均为m、半径均为r的均匀刚性球，在施加于1号球的水平外力F的作用下均静止，力F与圆槽在同一竖直面内，此时1号球球心距它在水平槽运动时的球心高度差为h。现撤去力F使小球开始运动，直到所有小球均运动到水平槽内，重力加速度为g。求：

(1)水平外力F的大小；

(2)1号球刚运动到水平槽时的速度；

(3)整个运动过程中，2号球对1号球所做的功。

对α受体和β受体都有阻断作用的药物是

A．普萘洛尔

B．醋丁洛尔

C．拉贝洛尔

D．阿替洛尔

E．吲哚洛尔

婴幼儿肺结核最常见的X线表现是

A．空洞和肺门淋巴肿大
B．结核球
C．肺内浸润影像和肺门淋巴结肿大
D．胸腔积液
E．散在结核钙化影

四气：是指在长期医疗实践中观察总结出来的四种不同的药性，以下属于四气的为：（）

A.寒

B.热

C.温

D.凉

E.暖