Which of the following equipment is for bo

题型:单项选择题

问题:

Which of the following equipment is for body protection?()

A.Safety helmets

B.Goggles and sepctacles

C.Breathing aparatus

D.Safety suits

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题型:单项选择题
已知点B(0,1),A,C为椭圆C:
x2
a2
+y2
=1(a>1)上的两点,△ABC是以B为直角顶点的直角三角形.
(1)△ABC能否为等腰三角形?若能,这样的三角形有几个?
(2)当a=2时,求线段AC的中垂线l在x轴上截距的取值范围.
题型:单项选择题

论述杜威的主要教育思想。

题型:单项选择题

一旦确诊为心室颤动应立即进行()

A.心脏起搏

B.静注利多卡因

C.静注异丙肾上腺素

D.静注阿托品

E.电复律

题型:单项选择题

After winning a big game, athletes are often asked how they feel. Usually athletes say how (1) it is to win this big game. On the contrary, the fact is that losing a big game, or in my case, all the games, can be even harder.

From the spectators’ point of view, last year’s basketball (2) for my high school team was nothing (3) of an embarrassment. And (4) 0 and 20 is certainly nothing to be proud of, that season had a bigger impact on me than any other. As a team captain, I knew it probably wouldn’t be the (5) year, but did I ever think we would lose every game Of course not. Since six of our top players had graduated, it was clear that we were a (n) (6) team who would struggle. The struggle began earlier than expected, (7) , as our team center was suspended (禁赛) for the season, and two key members decided to (8) for some reason. At this point, dropping out probably passed through every player’s mind, but in the end, we all stuck if out, (9) to work still harder.

Then there came a time when even our (10) and given up on us. Personally, I felt like it was (11) worthwhile giving my all. I thought, if even the coach doesn’t believe in us, why should I But just as my hope began to (12) , a teammate called a meeting. He said," Nobody thinks we are going to win, but, as teammates and friends, we (13) it to each other to go all out every game. "

It was that moment that (14) me how to be a leader. It hit me that I certainly didn’t (15) the role. As a leader you can never quit (16) the team who looks up to you. It is one (17) to be named captain, feel great and go through the motions, but it is quite another to be a real captain and make sure everyone realizes their full (18) all the time.

I am sure it is great to go through without losing and bringing home awards. But in all honesty, I (19) the fact that my team lost every game last year. It may not help me to become a better basketball player, but it already has made me a better leader, and (20)

8().

A.quit

B.stay

C.resign

D.rest

题型:单项选择题

下列关于外模式的叙述中,哪一个是不正确的

A.外模式处理的数据实际存储在数据库中

B.外模式是保证数据安全性的一个有效措施

C.一个数据库可以有多个外模式

D.外模式通常是模式的子集

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