按作用方式,杀虫剂可分为胃毒剂、()、熏蒸剂、内吸剂、拒食剂、驱避剂、引诱剂等。
参考答案:触杀剂
下列属于要约的是( )。
A.招标书
B.投标书
C.中标通知书
D.对标书进行决标
I was busy with my paper when I heard someone()in the room above.
A.moving on
B.moving off
C.moving up
D.move about