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【判断题】
通常吸入气雾剂的微粒大小以在0.5~5μm范围内最适宜。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】质点在有心力作用下运动时,力的作用线始终通过一固定点(力心),该力对力心的 为零,质点的 守恒。
A.
力 , 动量
B.
力,动量矩
C.
力矩 , 动量
D.
力矩,动量矩
【单选题】Which of the following points are NOT discussed in the speech?
A.
What are today's young generation up to?
B.
How are today's young generation different?
C.
What are teh differences they are going to make to shape the future of China or at large, the world?
D.
What negative impacts social media have on the young generation.
【单选题】Which of the following sentences is a transition in the speech?
A.
Let’s pause for a moment to summarize what we have found so far.
B.
I will focus on three solutions.
C.
Now that we have seen how serious the problem is, let’s look at some solutions.
D.
The first cause is inefficient agricultural products.
【单选题】Topical order results when you divide the speech topic into , each of which becomes a main point in the speech.
A.
different topics
B.
main topics
C.
subtopics
D.
subtopic
【单选题】Which of the following was NOT mentioned in the speech?
A.
Some myth about Thanksgiving story.
B.
Traditional Thanksgivng food.
C.
The commercial aspect of Thanksgiving.
D.
The spirit of Thanksgiving.
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