Which medical improvement proved vital in aiding European imperialism throughout sub-Saharan Africa?
a. improved first-aid procedures
b. quinine tablets to prevent malaria
c. improved water purification techniques
d. mass-produced bandages and antibiotics
b. quinine tablets to prevent malaria
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Every seed consists of three basic parts. These are ________, ________, and ________.
Fill in the blank(s) with the appropriate word(s).
How would a commercial truck diesel engine with a displacement of 6.8 liters be classified?
A. small bore B. medium bore C. large bore D. heavy-duty bore
The cutting edge of the boring tool:
A) Can be at any angle to the axis of the tool slide B) Must be in line with the axis of the tool slide C) Must be at right angles to the axis of the tool slide D) None of the above
Define a vacuum
A) A vacuum is anti-pressure created by counter clockwise molecular rotation. B) A vacuum is a negative pressure. C) Vacuum is the reciprocal of pressure. For every pressure there is a reciprocal vacuum. D) A vacuum is any pressure less than atmospheric pressure.