It is generally believed that climate change is caused by human activities .

Global warming is caused by human activities except the greenhouse effect.（ ）

The ethical and moral problems caused by intelligent machines and robots may be contrary to human moral concepts, so we should stop developing intelligent machines.

Which of the following is the characteristics of the outbreak caused by MERS-CoV A: Limited clustering outbreak caused by human transmission B: Outbreak spreads in community C: All groups f population are susceptible D: Infection of more than three generations occurs E: The mortality rate is not high, at about 3%

Which do you think would be the best title for the passage A: Accidents and Anxiety B: How Accidents Are Caused C: Human Factors in Accidents D: How to Prevent Accidents on Roads and in Factories

Many accidents ______ by careless drivers last year. A: are caused B: were caused C: was caused D: caused

The new moral dilemma is caused by ______. A: high death rate of heart transplants B: too low a proportion of successful operations C: delicate organs being transplanted D: too few human organs for too many recipients

Omissions in my recent article ____ confusion. A: can have caused B: can be caused C: must have caused D: must be caused

According to the third paragraph, improper calls on the football field ______. A: are evidence of corruption by some officials B: are increased by the higher speed of the game C: result from reduced proficiency of referees D: are caused by anything other than human error

In human, color blindness is caused by sex linked recessive genes, while blue eye is caused by autosomal recessive genes. A blue eyed woman whose father is color blind marries a brown eyed man whose mother is blue eyed. How many of their sons are blue eyed? ( ) A: 1/2 B: 1/3 C: 1/4 D: 3/4