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【单选题】
下列关于甘油的性质与应用中,错误的表述为
A.
可供内服或外用
B.
30%以上的甘油溶液有防腐作用
C.
能与水、乙醇混合使用
D.
甘油毒性较大
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皮皮学刷刷变学霸
举一反三
【单选题】某质点的运动函数为 x = t 3 +2 t - 6 ( SI ),则该质点作
A.
匀加速直线运动,加速度沿 x 轴正方向
B.
匀加速直线运动,加速度沿 x 轴负方向
C.
变加速直线运动,加速度沿 x 轴正方向
D.
变加速直线运动,加速度沿 x 轴负方向
【多选题】PowerPoint2010的优点有()
A.
为演示文稿带来更多活力和视觉冲击
B.
添加个性化视频体验
C.
使用美妙绝伦的图形创建高质量的演示文稿
D.
用新的幻灯片切换和动画吸引访问群体
E.
可添加多种类型的对象
【多选题】PowerPoint 2010的优点有( )
A.
为演示文稿带来更多活力和视觉冲击
B.
添加个性化视频体验
C.
使用美妙绝伦的图形创建高质量的演示文稿
D.
使用美妙绝伦的图形创建高质量的演示文稿
【单选题】Sun: Hello, I'm the sun. I'm strong. I give light to the earth. I'm No.1. Moon: Hello, I'm the moon. At night 1 give light to the earth. I'm stronger. I'm No.1. Sun: Your light is from me, isn't it'? ...
A.
the sun
B.
the moon
C.
the cloud
【单选题】听力原文:M: Hello, Ms. Davis. I am calling from MCI to explain our new long distance calling plan. W: Hmm... I am already using Sprint for 60 cents per minute to Japan. M: We can give you a better deal wi...
A.
The promotion of a telephone service.
B.
Making a sales plan for new products.
C.
A flight reservation.
D.
Complaining about a faulty product.
【单选题】听力原文:M: Hello. This is Tom. Can I speak to Mary, please? W: Speaking. Q: Who is answering the phone? (17)
A.
Tom.
B.
Mary.
C.
Mary's brother.
【单选题】听力原文:M: Hello! Is that box heavy? W: No, it is light. But it is full of fruit. Q: What is in that box? (18)
A.
Egg.
B.
Bag.
C.
Fruit.
【单选题】1859年,达尔文的《物种起源》出版,他用大量事实论证了自然界中的生物的物种是不断进化的,是不断从低级向高级发展的。它证明了整个有机界——植特、动物,包括人类在内,都是长期发展进化过程的产物。下列对达尔文及《物种起源》评述中,错误的是()
A.
深刻揭示了人类社会发展的一般性规律
B.
给漏洞百出的上帝创造万物说致命一击
C.
继承和发展了前人关于生物进化的思想
D.
强调物竞天择适者生存对生物界的意义
【单选题】听力原文:W: Hello, Patrick, is that you? M: Yeah Jane, what can I do for you? W: I was calling about the apple tree that you were trimming yesterday. M: That was hard work! W: I'm sure it was. It sure loo...
A.
He picked up some apples in his yard.
B.
He cut some branches off the apple tree.
C.
He quarreled with his neighbor over the fence.
D.
He cleaned up all the garbage in the woman's yard.
【判断题】钨极氩弧焊以高熔点铈钨棒作为电极,所以能通过的电流比熔化极氩弧焊大,可以焊接厚板。
A.
正确
B.
错误
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