Text Organization Exercises(副本) The text falls into four parts. Now go over the text and write down the main idea of each part.

Only after I read the text over again _____ its main idea.

When asking students to quickly run their eyes over a whole text to get the gist, we are training their skill of ______.

Only after I read the text over again (__) its main idea. A: Iknew that B: didIknow C: Icouldknow D: Ididknow

Which is the right definition（定义）of "scanning" ? A: To look quickly over a section of text to get a general idea of the meaning. B: To read quickly to locate a particular fact or figure, or to see whether this text mentions a subject we are researching.

According to the text, the lawyer has the 1.________advantage of both typing and preparing a legal brief over the assistant. But according to 2._______________ advantage , the lawyer should prepare a legal brief, and the assistant should 3.__________________

Only after I read the text over again ______ its main idea. A: that I knew B: did I know C: I could know D: I did know

Only after I read the text over again _____ its main idea. A: that I knew B: did I know C: 1 could know D: I did know

Only after I read the text over again _____ its main idea. A: that I knew B: did I knew C: I could know D: I did know

函数$f(x)=x+\sin x$的( )。 A: 上凸区间为$(2n\text{ }\!\!\pi\!\!\text{ },(2n+1)\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$((2n-1)\text{ }\!\!\pi\!\!\text{ },2n\text{ }\!\!\pi\!\!\text{ })$ B: 上凸区间为$((2n-1)\text{ }\!\!\pi\!\!\text{ },2n\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$(2n\text{ }\!\!\pi\!\!\text{ },(2n+1)\text{ }\!\!\pi\!\!\text{ })$ C: 上凸区间为$(n\text{ }\!\!\pi\!\!\text{ },(n+1)\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$((n-1)\text{ }\!\!\pi\!\!\text{ },n\text{ }\!\!\pi\!\!\text{ })$ D: 上凸区间为$((n-1)\text{ }\!\!\pi\!\!\text{ },n\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$(n\text{ }\!\!\pi\!\!\text{ },(n+1)\text{ }\!\!\pi\!\!\text{ })$