回答下列各题 Its difficult to estimate the number of youngsters involved in home schoolin
A.work rapidly
B.be large and expensive
C.be easy to use
D.be used for fun
A.are no more interesting than form. of thinking
B.are much more interesting compared with thoughts
C.are reflections(反映)of one’s body
D.can tell people what they should do
A.do experiments with water
B.purify the used water and reuse it
C.use fresh water once again
D.make use of seawater
A.It is lower than the Noah Rim.
B.It is hard to get,to even in good weather.
C.It is not open in winter months.
D.It attracts over。five million visitors each year.
A.a bank is closed for one or more days
B.too many depositors try to draw out their money at one time
C.there is not enough money to pay all its depositors at one time
D.tellers of a bank take their own money from the bank
A.quite common
B.very rare
C.something difficult
D.almost impossible
我国西北干旱半干旱区油气资源丰富。回答下列各题。 西部大开发首先要()。
A.发展高新产业,加快城市化进程
B.人口外迁.减轻环境压力
C.治水改土.改造低产田
D.抓好基础设施和生态环境建设
A.英语普及
B.劳动力成本较低
C.信息技术发展较迟
D.人力资源丰富