多数可控震源采用液压系统,工作压力达(),有的高达()。
参考答案:3000psi;6000psi
在个人/家庭资产负债表中,( )不能使净资产值上升。
A.收到利息收入
B.提前偿还房贷
C.所持有的股票升值
D.继承遗产
用所给单词的适当形式填空。
1. Simon said he had a _______( please) journey last week.
2. Every year many _______( tour) come to Beijing to visit the Great Wall.
3. We should work hard at English because it's important in our_______( day) life.
4. It is_______ (possible) for him to finish the work in one hour, because it's very difficult.
5. Don't worry! They can take care of_______( they).