People who work at night_______.
A. lose the chance to gaze stars
B. have a higher risk of health problem
C. have less exposure to white light
D. are to blame for light pollution
查看答案
俗称“空气开关”的是()。
A. 低压断路器
B. 低压刀开关
C. 刀熔开关
D. 低压负荷开关
The word ”dimensions” in the last paragraph possibly means________.
A. directions
B. aspects
C. lessons
D. ambitions
What is incredible about a child is that______
A. he is born with the capacity to speak
B. he has a brain mole complex than an animal's
C. he can produce his own sentences
D. he owes his speech ability to good nursing
Which of the following is not mentioned in the passage？______
A. The faculty of speech is inborn in man
B. Encouragement is anything but essential to a child in language learning
C. The child's brain is highly selective
D. Most children learn their language in definite stages
微信支付 
支付宝支付