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(三)德育渗透点

通过对解题方法和规律的概括,了解个性与共性.特殊与一般间的关系,培养辩证唯物主义观点,又从有理有据的论证过程中培养严谨的学风.

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(二)能力训练点

通过严格的推理论证,培养逻辑思维能力,发展空间想象能力.

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(一)知识教学点

掌握利用平面的基本性质证明诸点共面、诸线共面、三点共线、三线共点问题的一般方法.

1.证明若干点或直线共面通常有两种思路

(1)先由部分元素确定若干平面,再证明这些平面重合,如例1之①;

(2)先由部分元素确定一个平面,再证明其余元素在这平面内,如例1之②.

2.证明三点共线,通常先确定经过两点的直线是某两个平面的交线,再证明第三点是这两个平面的公共点,即该点分别在这两个平面内,如例2.

3.证明三线共点通常先证其中的两条直线相交于一点,然后再证第三条直线经过这一点,如练习.

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100. -Need he come a little earlier?    -Yes, he _________.

A.   can  B. must  C need  D. needn’t

1~10  C C B A A A D A B B 11~20  B A A A B C D B C A 21~30  A A A A B B D A B A

31~40  D A C B A D D A D D 41~50  D B C C D D D A B D 51~60  B C A A C B A C A B

61~70  B C D C D C B D A C71~80  A A B A B B B D C D81~90  B D D C D B C A D C

91~100  C C B D C D A C D B

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99.There is _______ W in the word woman, and ________ M is the third letter of the word.

A.   a; an  B. an; /  C. an; the  D. a; the

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98.We can’t buy ________ much mutton with ________ little money.

A.   so, much  B. such, so  C. so, so  D. such, such

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97. -(At the doctor’s) It’s nothing serious, doctor?   -No, _________.

A.   you’ll be all right soon  B. You won’t be all right soon

B.   There’s some trouble with you   D. It’s very serious

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96.Lucy, ________ all your things on the desk.

A.   puts away  B. put away  C. takes away  D. take away

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95.You must leave here now _________ your mother can get some more rest.

A.   became  B. though  C. so that  D. so

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94.She doesn’t know the school, but it’s __________ to be quite a good one.

A.   told  B. spoken  C. talked  D. said

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