夹持管子50mm时,管钳规格长度最小应该是()。
A.250mm
B.300mm
C.350mm
D.340mm
参考答案:C
用单词的适当形式填空。
1.You can ________(wash) your hands in the bathroom.
2.He ________(watch) TV every evening.
3.Danny is ________(sit) in a chair.
4.He is ________(write) a letter.
5.I ________(be) from China.
6.Mr. Wood ________(teach) a lesson.
7.Let's ________(make) a chart.
8.I like ________(sing).
9. She ________(come) last Monday.
10.________(do) you brush your teeth this morning?
低产气井的特点是什么?