When the moon appears as a thin crescent in the evening sky, just after sunset, the lunar phase is ________
A) new moon B) between second and third quarter
C) between new moon and first quarter D) between first and second quarter
A
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What type of climate was this soil formed in?
A) Polar
B) Arid
C) Tropical
D) Humid and temperate
Visitors from USA comprise about ________% of tourists to Southeast Asia
A) 1 B) 4 C) 12 D) 25
Which of the following statements about organic compounds is true?
A) Only naturally occurring compounds are considered organic compounds. B) The number of naturally occurring compounds and the number of synthetic compounds are approximately equal. C) The number of naturally occurring compounds greatly exceeds the number of synthetic compounds. D) The number of naturally occurring compounds is much smaller than the number of synthetic compounds.
The anti-ulcer drug cimetidine blocks which of the following receptors?
A) only H1 B) only H2 C) both H1 and H2 D) neither H1 nor H2