Where were the two people detained？
A. In Pakistan
B. In Iran
C. In India.
查看答案
Why did Linda choose eggs to lose weight？
A. Because she believed eggs were not very expensive and also contained a lot of protein.
Because she had been told that eating eggs could help her to have a fine figure.
C. Because she liked eggs so much that she could not stand if she didn't eat eggs every day.
The experts' study on the problem of erosion can ______.
A. warn people whose homes are in danger
B. provide an effective way to slow it down
C. help the prevent it from worsening
D. lead to its eventual solution
在确定水泵的安装高度时，利用水泵允许吸上真空高度Hs，此Hs为水泵进口真空表HV的最大极限值，在实用中水泵的()值时，就意味水泵有可能产生气蚀。
A. Hv=Hs
B. Hv＜Hs
C. Hv＞Hs
D. Hv=Hs
系统特征方程为D(s)=s3+2s2+s+2=0，则该系统()。
A. 右半S平面有1个闭环极点
B. 稳定
C. 右半S平面有2个闭环极点
D. 临界稳定
微信支付 
支付宝支付