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【单选题】
道路交通标线按功能可分为以下3类：指示标线、禁止标线和警告标线。 ( )A.
正确
B.
错误
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反馈参考答案：
举一反三
【简答题】什么是溶剂抽提法?常用的抽提方法有哪些?
【简答题】Once upon a time there was a man in a small town. He had two children, a boy and a girl. The boy was good-looking but the girl was not. One day they found a mirror (镜子) for the first time and they saw...
【单选题】因水文现象具有不重复性的特点，故需()地对水文现象进行长期的观测，积累水文资料，进行水文统计，分析其变化规律。
A.
年复一年
B.
只测一年
C.
只测三年
D.
每隔一年
【简答题】FileInputStream.read()方法可能产生( ) 异常
【简答题】Fill in the blank with animals 1.His son did not come home until the next morning. He could not go to sleep and was like a _____ on hot bricks. 2.It rained heavily and we came home like drowned ______...
【判断题】The boy did not like the new maid. He shouted her every time she tried to touch him.
A.
正确
B.
错误
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