【单选题】Questions 11 and 15 are based on the following passage. That people often experience trouble sleeping in a different bed in unfamiliar surroundings is a phenomenon known as the “first-night” effect....
A.
She monitored the brain activity of participants sleeping in a new environment.
B.
She recruited 35 participants from her Department of Psychological Sciences.
C.
She studied the differences between the two sides of participants’ brains.
D.
She tested her findings about birds and dolphins on human subjects.
【单选题】A diffraction pattern is produced on a viewing screen by illuminating a long narrow slit with light of wavelength λ. If the slit width is decreased and no other changes are made
A.
the intensity at the center of the pattern decreases and the pattern expands away from the bright center
B.
the intensity at the center of the pattern increases and the pattern contracts toward the bright center
C.
the intensity at the center of the pattern does not change and the pattern expands away from the bright center
D.
the intensity at the center of the pattern does not change and the pattern contracts toward the bright center
【单选题】Questions 11 and 15 are based on the following passage. That people often experience trouble sleeping in a different bed in unfamiliar surroundings is a phenomenon known as the “first-night” effect....
A.
They tended to enjoy certain tones more than others.
B.
They tended to perceive irregular beeps as a threat.
C.
They felt sleepy when exposed to regular beeps.
D.
They differed in their tolerance of irregular tones.
【单选题】Questions 11 and 15 are based on the following passage. That people often experience trouble sleeping in a different bed in unfamiliar surroundings is a phenomenon known as the “first-night” effect....
A.
She found birds and dolphins remain alert while asleep.
B.
She found birds and dolphins sleep in much the same way.
C.
She got some idea from previous studies on birds and dolphins .
D.
She conducted studies on birds’ and dolphins’ sleeping patterns.
【单选题】Questions 11 and 15 are based on the following passage. That people often experience trouble sleeping in a different bed in unfamiliar surroundings is a phenomenon known as the “first-night” effect....