单项选择题

According to the passage, dogs and cats,

A．as well as human beings can not see some colours
B．have fewer cones than human beings
C．have less rods than human beings
D．can see colours as well as human beings

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热门试题

单项选择题

Which of the following statements is NOT TRUE

A．Very high expectations for the individual make him more prone to depression.
B．A depressed person feels sad and dejected.
C．People need not attempt to hide their depression because it's not a shameful thing.
D．Depression is hereditary.

单项选择题

Depression can be easily cured______.

A．if the patient is young
B．at the early stage of the disease
C．when plants are in bad
D．if the patient goes to see a psychologist