The main idea of this passage is that ______.
A. light causes sea color
B. sea coloration is varied because of a combination of length of light waves and microscopic plant life and silt
C. microscopic plant life causes sea color
D. water composition causes sea color
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Who first gave baseball a standard set of rules'？
Abner Doubleday.
B. Alexander Cartwfight.
C. Albert Spalding.
D. Babe Ruth.
Which of the following is NOT a type of phytoplankton？
A. Green algae.
B. Diatoms.
C. Blue-green algae.
D. Amoeba.
We learn from the passage that coordinated efforts will be made by various U.S. government
A. refuse the renewing of expired visas.
B. ward off terrorist suspects at the border.
C. prevent the forgery of immigration papers.
D. limit the number of immigrants to the U. S.
中国人民银行《贷款风险分类指导原则》规定，从2002年起，在我国各类银行全面实行贷款质量四级分类管理，即：正常、逾期、呆滞和呆账。 ()
A. 正确
B. 错误
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