how many country are there in the UN?哪里错了?

how many country are there in the UN?哪里错了? in,how,the,flag,many,there,UN,are,急 how many countryies are there in the un How many knifas are there in the box?这个句子哪里错了 How many _____(science)are there in your country? How many orange jam are there in the bottle?错在哪里?怎么改? How many students there are in your school?这题哪里错了? How many minutes are there in a hour?这句话哪里错了 How many there are months哪里错了? How many goats are there?Two hundteds.哪里错了? How many glass of water are there on the table?哪里错了 How many [ ] are there in the hospital?