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【简答题】
Read and answer. (阅读短文并回答问题) A fox is hungry. He sees some black grapes. They hang in a very tall them very much. He jumps and jumps, but he still can't reach the grapes. him. In the end, the fox gives up. “I don't want to eat the grapes. They are not good to eat at all.” He says to himself. 1. The fox is____. A. happy B. hungry C. full 2. The grapes hang in _____. A. a tall tree B. a short tree C. a wall 3. Why does the fox give up? A. Because the grapes are not good to eat. B. Because he can't reach the grapes. C. Because he is not hungry.
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【单选题】关于直接碘量法和间接碘量法，下列叙述正确的是
A.
直接碘量法用于还原性物质的测定，间接碘量法用于氧化性物质的测定。
B.
直接碘量法和间接碘量法都用于还原性物质的测定。
C.
直接碘量法和间接碘量法都用于氧化性物质的测定。
D.
直接碘量法用于氧化性物质的测定，间接碘量法用于还原性物质的测定。
【简答题】以下属于预防性维护作业的是: ( ) 。 A 、日常维护 B 、一级维护 C 、二级维护 D 、三级维护
【判断题】车长大于9m的公路客车、旅游客车和未设置乘客站立区的公共汽车，所有专用校车、危险货物运输车和半挂牵引车，总质量大于等于12000kg的货车和专项作业车及总质量大于10000kg的挂车应安装符合GB/T13594规定的防抱死制动装置。
A.
正确
B.
错误