According to the passage, how are ants guided by trail pheromones？
A. They concentrate on the smell of food.
B. They follow an ant who is familiar with the trail
C. They avoid the vapor spaces by moving in a straight line.
D. They sense the vapor through their antennae.
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A．There are not very many hotels in the area.B．She stayed at the Clover Inn last month
A. There are not very many hotels in the area.
B. She stayed at the Clover Inn last month.
C. She is not sure the man's parents would like the Clover Inn.
D. It may be too late to get a room at the Clover Inn.
Which graph is being described？
Which one of the following is NOT one of the measures to promote the use of the new lanterns？
A. Similar looks with the old kerosene ones.
B. Fixed price of $30 for all models.
C. Reliable to work when needed.
D. Replaceable batteries.
药品生产企业质量管理部门负责评价原料、中间产品及成品质量的E．
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