A bag contains 6red marbles, 5yellow marbles, and 7green marbles. How many additional red
A. 12
B. 16
C. 18
D. 24
E. 36
查看答案
When the voltage was 4.50 volts and the temperature was 23°C, what was the current when
A. 72mA
B. 81mA
C. 90mA
D. 420mA
Which of the following findings is best explained by the competing parental interest theory？
An imprinted gene has been discovered in humans that appears to influence a child’s social skills.
B. In the imprinted genes that have been most fully studied, the female turns the gene off, while the male’s gene remains active.
C. Studies with a monogamous mouse species indicate that imprinted genes are not active.
D. One of the imprinted genes studied is known to control a growth-stimulat-ing hormone.
Supporters of the competing parental interest theory assume that:
A. only females have an interest in regulating the size of their offspring
B. only males have an interest in ensuring the health and survival of their offspring.
C. both males and females have an interest in producing as many offspring of their own sex as possible.
D. both males and females have an interest in transmitting their genetic material to as many offspring as possible.
三相异步电动机一般可直接启动的功率为()kW以下。
A. 10
B. 7
C. 16
微信支付 
支付宝支付