题目内容

According to Paragraph 6, what error had Ames made at first?

A. He thought only man-made chemicals dangerous.
B. He suspected his experiments and tests.
C. He is sometimes naive and ignorant.
D. He considered most natural substances negative.

查看答案
更多问题

The word barbarians in Paragraph 9 is closest in meaning to______.

A. impolite people
B. wild animals
C. wasteland
D. uncivilized people

题图所示RLC串联的正弦电路,当ω=5000rad/s时发生谐振,已知R=5Ω,L=100mH,端口总电压有效值U=10mV。求Q和通带宽度BW值及电路所标变量的有效值。

题图所示交流电路,当ω=1000rad/s时发生谐振,已知端口总电压有效值U=180V。求电容C值及端口电流有效值I。

Based on the passage, which of the following statements can best describe the side effects

About 5 to 10 percent of children experience mild temporary side effects.
B. Side effects of a flu vaccine will usually last for a very long period of time.
C. If a child has never been infected by flu, he or she is more likely to have side effects
D. If a person has been exposed to the influenza virus before, he or she will not have side effects

答案查题题库