Why were cracks in old houses not a big concern？
A. Because indoor cleanliness was not emphasized.
Because energy used to be inexpensive.
C. Because environmental protection was given top priority.
D. Because they were technical unavoidable.
查看答案
This passage is most probably taken from an article entitled" ______".
A. Energy Conservation
B. House Building Crisis
C. Air pollution Indoors
D. Traps in Building Conservation
According to the passage, which of the following is not true？
A. Moods influence one's emotions.
B. To talk them out in a bad mood is good though no one listens.
C. Aerobic exercise is an efficient and nonpoisonous way to cure for a bad mood.
D. There are several ways to cure for a bad mood.
Which of the following is TRUE？
A. Man is sensitive to the ultra-violet.
B. Man is more color-conscious than the honey-bee.
C. The honey-bee is blind to red.
D. The honey-bee can see far more colors than man.
What is the main idea of the passage？
A. Man has not fully utilized all his senses.
B. Man is not as good as animals in learning about the environment.
C. All senses have their limitations.
D. Insects are more sensitive to colors than man.
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