[单项选择]Compared to a normal distribution, a lognormal distribution is least likely to be:（）
A. skewed to the left.
B. skewed to the right.
C. useful in describing the distribution of stock prices.

[单项选择]Compared to a normal distribution, a lognormal distribution is least likely to be:（）
A. skewed to the right.
B. skewed to the left.
C. useful in describing the distribution of portfolio values.

[单项选择]According to the analysis, compared with normal children today, children treated for mental illness 50 years ago______.
A. were less isolated physically
B. were probably less self-centered
C. probably suffered less from anxiety
D. were considered less individualistic

[单项选择]According to an analysis, compared with normal children today, children treated as mentally ill 50 years ago ______.
A. were less isolated physically
B. were probably less self-centered
C. probably suffered less from anxiety
D. were considered less individualistic

[单项选择]Compared to normal markets, the existence of fraud and the use of violence in black markets generally leads to:（）
A. poorer economic efficiency.
B. superior economic efficiency.
C. lower profit rates for sellers.

[单项选择]A normal distribution can be completely described by its:（）
A. mean and variance.
B. skewness and kurtosis.
C. mean and mode.

[单项选择]A distribution that is more peaked than normal is:（）
A. skewed.
B. platykurtic.
C. leptokurtic.

[单项选择]The lower limit of a normal distribution is:（）
A. negative infinity.
B. zero.
C. one.

[单项选择]If a normal distribution has a mean of 10 and a variance of 40, a standardized value of 0.5 corresponds to an observation value that is closest to:（）
A. 6.84.
B. 13.16.
C. 20.00.

[单项选择]If X has a normal distribution with μ=100 and σ=5, then there is approximately a 90% probability that:（）
A. P(90.2＜X＜109.8).
B. P(87.1＜X＜112.9).
C. P(91.8＜X＜108.3).

[单项选择]Which of the following hypothetical scientific discoveries, if made, would weaken the author's arguments concerning the ethical risks of human cloning
A. (A) Through careful and documented study, cloning proves to be less risky than consanguineous breeding.
B. (B) A laboratory process for reducing the number of stages in the cell division process is developed.
C. (C) A non-cloning method for curing human fertility is discovered, thereby reducing the need to rely upon cloning.
D. (D) A procedure for easing the acclimation of a foreign nucleus in the embryonic host is established.
E. (E) A means of assessing genetic mistakes in a foreign nucleus before its implementation into a clone is devised.

[单项选择]What feature sets apart the three dictionaries discussed in the passage from traditional ones
A. The combination of two dictionaries into one.
B. The new approach to defining words.
C. The inclusion of cultural content.
D. The increase in the number of entries.

[单项选择]Distribution information involves making information available to project stakeholders in a timely manner．Which of the following tools can you use in the distribution information process
A. Organizational process asset
B. Communication metho
C. Performance reportin
D. Communications requirement analysi

[单项选择]Compared to common electrical conductors, superconductors
A. have little or no electrical resistance.
B. can be used for a long time.
C. are not energy-efficient.
D. can be made easily.