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 发布时间：2017-06-19 21:58 │ 来源：www.tikuol.com 题型：选择题 问题： 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
题型：选择题 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 查看答案
题型：选择题 下列有关声现象的说法，不正确的是( )A．吉他声是由琴弦的振动产生，并能像光一样在真空中进行传播B．用手指在同一根琴弦的不同位置按压，可以弹奏出音调不同的声音C．超声波可以粉碎结石．说明声音具有能量D．合理利用噪声可以控制植物提前或推迟发芽，以此来除掉杂草 查看答案