氢化钙可以作为生氢剂(其中CaH2中氢元素为-1价),反应方程式如CaH2+2H2O=Ca(OH)2+2H2↑,其中水的作用 ( )
The doctor told me to give upsmoking.( )
give in
give away
practice
stop
Do you know how to work outthe difficult math problem?( )
bring out
carry on
solve
do with
Dad, I don't know how to repair my bike. Could you give me a hand?( )
hand in
help me
find out
drive me
We, Chinese people, are proud ofthe Great Wall.( )
take pride in
take action on
take a look at
take part in
We must keep offthe forest fire if there is one. It's dangerous to stay near it.( )
catch up with
put off
keep up with
stay away from