张山是一著名童星，收入丰厚，其父张海从其收人中拿出2万元，资助了生活困难的弟弟张洋(张山的叔叔)，此行为 ()
A. 有效
B. 无效
C. 效力待定’
D. 得到张山同意后有效
查看答案
According to this passage, a scientist would conceive of a "table" as being ______.
A. a solid motionless object
B. certain characteristic vibrations in "ether"
C. a form. fixed in space and time
D. a mass of atoms on motion
How does the newborn screening test work？
A. It looks for abnormal arrangements of the gene.
B. It detects innate errors by checking the proteins.
C. It takes cell samples from body fluids or tissues.
D. It requires taking the carrier testing first.
The word "aberrant" in Paragraph 3 most probably means ______.
A. unhealthy
B. weird
C. agitated
D. mysterious
The whole passage is intended to ______.
A. help readers have a better understanding of nanotech
B. show that industries are all set for the nanotech age
C. tell readers the hurdles ahead the research of nanotech
D. reveal the potential benefits and big business of nanotech
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