In a paragraph, the topic sentence is _______.</p></p>

Which one is NOT the important procedure to choosing a research topic? </p></p>

(Unit 8, Reading 1) Which is the topic sentence in this paragraph? </p> </p>

You need to provide sufficient ( ) on the topic to help readers have a basic understanding of the subject. </p></p>

The fact that so many people have posted comments on this topic shows how ______ and complicated it is. </p></p>

There are two main points used in the paragraph to develop the position taken in the topic sentence (the success of assignment essays as a learning device). What are they? (choose two) <p></p>

If you invite somebody to speak at a conference, you should mention in the invitation letter the type of speech, the topic or the scope and how long the speech will be. </p></p>

与以下定义等价的是 ( ) int * p [4] A．int p [4] B．int * p C．int *(p[4])． D．int( * p)[4]

令A=(P 1 P 2 P 3 P 4 P 5 P 6),其中P 2 P 3 P 4 P 5为单位列向量,则( )一定是一个基。 A: P 1 P 2 P 3 P 4 B: P 2 P 3 P 4 P 5 C: P 3 P 4 P 5 P 6 D: P 2 P 3 P 4 P 6

The problems need to be avoided in choosing a research topic（ ）. A: The topic is too broad. B: The topic is not interesting. C: The topic is too narrow. D: The topic is too hard.