回采工作面的端面距不应大于()。
A、0.5m
B、0.6m
C、0.34m
参考答案:C
用所给单词的适当形式填空。
1. My favourite (sport) are soccer and basketball.
2. I often wear (run) to play soccer
3. How much (be) a pair of shoes ?
4. I want (learn). Can you teach me ?
5. Do you have (some) balls ?
方程(x+1)(x-2)=x+1的解是( )
A.2
B.3
C.-1,2
D.-1,3