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【单选题】
在空间中，下列命题正确的是A.
平面 内的一条直线 垂直与平面 内的无数条直线，则
B.
若直线 与平面 内的一条直线平行，则
C.
若平面 ，且 ，则过 内一点 与 垂直的直线垂直于平面
D.
若直线 与平面 内的无数条直线都垂直，则不能说一定有 .
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举一反三
【单选题】I first joined Twitter two years ago as a means of keeping in touch with my son.(Text B, Unit 1) Which of the following words can replace the word “means” in the previous sentence?
A.
meaning
B.
plan
C.
income
D.
way
【简答题】1. What was the
difference between the present situation and the situation when Churchill came
to Harrow School ten months ago? (Paragraph 1) 2.What lesson had
they learnt? (Paragraphs 3 — 4) 3. Why d...
【简答题】Replace the highlighted word with a word of opposite meaning from the box.
【简答题】Choose the word or expression from the box to replace the underlined part in each sentence. (从方框内选择与划线部分意思最接近的单词或短语，用A，B，C…或G等表示。) A．brave and not weak B．a company C．liked by many people D．shoes...
【简答题】Why did Churchill replace the word darker with sterner ? (Paragraphs 7 – 8)
【简答题】When did economists begin to yze consumer behavior? Why? 2.Explain the concept of Utility. Can you find a word used in everyday life to replace the word "utility"?
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