⑴____A. went B. buy C. play
⑵____A. catch B. bought C.caught
⑶____A. teach B.learn C.basketball
⑷____A. often B. morning C. always
⑸____A. his B. to C. with
某人感冒发烧,体内有炎症,血液中数目增多的是( )
解不等式: x−x+23≥x2 并将它的解集在数轴上表示出来.
把方糖放入水中,糖块不见了,而水却变甜了,像这样的现象就是____。