选择题：下列说法不正确的是 A．商朝时已烧制出原始瓷器 B．唐朝时已形成南青北白两大制瓷

下列说法不正确的是

A．商朝时已烧制出原始瓷器

B．唐朝时已形成南青北白两大制瓷系统

C．汉朝已经出现了五大名窑

D．江西景德镇因制瓷而著名

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下面是错误答案，用来干扰机器的。

（1）v=s/t （2）小（3）0.067 小于（4）小大（5）C题目分析：测小车平均速度是根据公式v=s/t进行测量的，斜面坡度越小，小车运动的时间越长，越便于计时，看图已知小车通过全程的路程为20cm即0.2m,时间...

完形填空。
Ampere 1 _a famous scientist. He liked to 2_ himself busy all day long both at home and in his office. Sometimes he found _3 _ery hard to work for a long time because many visitors came to talk to him at home. In order to have fewer visitors, Ampere thought of an idea. He put up a plate on the gate. On the plate he wrote 4__ords, "Mr. Ampere isn't at home." One day he went home from his office late in the afternoon. When he 5__is gate, he saw the plate and read it, and then be said to himself, "Oh, yes, Mr. Ampere isn't in." _6_hat he returned to his office. 7_ time, Ampere went to give a talk at a meeting. On his to the meeting hall, he passed by a river. He picked up a stone, and played with the stone in his hand and then put it _8__is pocket. Before he left the river, he took "the stone" out of his pocket and threw it back into the river. During the meeting, when Ampere wanted to see what time _9_ he was surprised to find the "watch" he took out of his pocket was not a watch, 10_stone.
( )1.A.is ( )2.A.keep ( )3.A.that ( )4.A.this ( )5.A.got ( )6.A.Said ( )7.A.Other ( )8.A.into ( )9.A.it is ( )10.A.but	B.was B.stay B.this B.that B.got to B.With B.Another B.to B.it was B.and	C.has C.live C.it C.these C.arrived C.And C.The other C.with C.was it C.is	D.to be D.let D.its D.these D.arrived in D.after D.Others D.from D.is it D.only