《铁路线路修理规则》规定，明桥面小桥的全桥范围内不应有钢轨接头，否则应将其焊接、冻结或胶接。
参考答案：对
用括号内所给单词的适当形式填空。
1. Look! Stephen _______ (lie) on the bunk bed.
2. Lily, _______ (look) out of the window. There is a lovely dog.
3. Everyone in our family _______ (like) to watch Lucky 52.
4. Liu Xiang is good at _______ (run).
5. _______ (can) Jim speak Chinese before he came to China?
所给四幅图中，正确表示北半球夏至日的是（）
A.
B.
C.
D.
