35的分子扩大为原来的3倍,要使分数大小不变,分母要乘3.
故答案为:√.
腰椎间盘突出症与腰椎管狭窄的鉴别,主要依据是
A.有无向下肢的放射性疼痛
B.有无间歇性跛行
C.腰部疼痛的程度
D.CT检查
E.X线平片
动词填空。
1. My uncle with my grandparents ________ (live) in Beijing.
2. Is it time for us ________ (begin) our class?
3. We have fun ________ (swim) in the pool every summer.
4. Mary is clever and can ________ (speak) four languages.
5. I spend about half an hour ________ (chat) with my friends on the Internet.
6. ---Tom, __________(wash) the dishes after supper.
---OK, Mum.
7. Your new friend __________ (sound) good. I want to make friends with him.
8. This pair of shoes________(not be) for Millie. They are for Sandy.
9. Everyone in Mr Wu's class ________ (not do) homework at school.
10. ________ his Chinese and English teachers ________ (come) from the same city?