吸过的烟头直接扔进纸篓,会使纸张燃烧,引起火灾。
参考答案:对
The employers often give the job to ________they believe have work experience with strong sense of duty.
A.whichever
B.those who
C.who
D.whomever
甘薯茎平卧地面生长,并从节上产生不定根,是匍匐茎。