3 biology mc questions (急)

1.The crying of a baby on being born is a reflex action initiated by

A. a drop in its surrounding temperature.
B. direct contact
with air.(because the lungs are filled up with air making crying easier)
C. its being separated from the placenta.
D. the
absence of the surrounding amniotic fluid

2. Impulse from the
cerebellum may result in
A. peristalsis.
B. deeper breaths.

C. a withdrawal reflex
D. maintaining muscle tone.(because the cerebellum is mainly for motor control)

3.
Why are sexually transmitted diseases more difficult to control than
other infectious diseases?
(1) All the pathogens involved cannot
be controlled by antibiotics.
(2) The infected persons are not
willing to seek proper medical advice.
(3) The transmission of the
diseases involves personal behaviour and is therefore difficult to
control.
A. (1) and (2) only
B. (1) and (3) only
C.
(2) and (3) only(because some STD can be treated with antibiotics)
D. (1), (2) and (3)