问题
填空题
带式输送机一般都装有（）可逆自动调心托辊，（）自动调心托辊。
答案
参考答案：槽形双向；平行
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带式输送机一般都装有（）可逆自动调心托辊，（）自动调心托辊。
参考答案：槽形双向；平行
| 用所给单词的适当形式填空. | |
Australia is as old as time. Probably it was once __1__ to South America,but the continent __2__ as the earth's plates moved. Australia was discovered about 53,000 years ago. It is __3__ that the first people crossed into Australia from Asia on a great land bridge when the water level of the oceans was __4__. Once they __5__ aborigines,which means the first people of a country. They developed a strong system of society __6__ a way of life that was __7__ for this hot and in many places dry country. No one knows how many Kooris lived in Australia,but today they only __8__ a little over 1% of the population. Australia,with its natural beauty and the beautful buildings,__9__ tourists from all over the world. And many birds and animals are found __10__ only on this land. |