设这个数是3;
3÷16=18;
18是3的6倍;
故答案为:正确.
Attempts have been made for nearly three decades to increase the amount of precipitation from clouds by seeding them with salt or silver iodide.
A.Devices
B.Hypotheses
C.Efforts
D.Suggestions
浸渍活性炭通过()来达到防毒作用。
A.物理吸附
B.化学吸附
C.催化作用
D.隔离作用