According to the passage, the first settlers used wood for their utensils and tools because it was ______.
The passage suggests that the early shops for making tools were ______.
Which of the following objects was an important woodworking tool used by early American craftsmen?
In the last sentence, the word "bust" most probably means ______.
Medicine Directions
Take two tablets with warm water, followed by one tablet every eight hours, as required. For maximum nighttime and early morning relief, take two tablets at bedtime. Do not exceed six tablets in twenty-four hours.
For children six to twelve years old, give half the adult dosage. For children under six years old consult your doctor.
Reduce dosage if nervousness, restlessness, or sleeplessness occurs.
The label on this medicine bottle clearly warns not to take more than ______.
What should you do ff your child is under six years old?
How many tablets should one take before he goes to sleep?
We can infer by this label that ______.
Clearly the medicine ______.
密封圈的宽度应大于或等于电缆外径的( )倍，但不能小于10mm。
《煤矿安全规程》规定：井下空气中二氧化氮的浓度不得超过( )。