二元一次不等式解法0x-a<1的解集中任何一个X的值均不在1<=X<=3的范围内 求a的值<=为小于

弹性的强弱受烟叶成熟度的影响()。

A.从尚熟到成熟，随成熟度的增加弹性增强

B.从尚然到成熟，随成熟度的增加弹性减小

C.从成熟到过熟，烟叶的弹性逐渐减弱，

D.从成熟到过然，烟叶的弹性不发生变化

此题为多项选择题。请帮忙给出正确答案和分析，谢谢！

7岁儿童有意注意时间为

A.10分钟

B.15分钟

C.20分钟

D.25分钟

E.30分钟

请帮忙给出正确答案和分析，谢谢！

Which of the following is CORRECT about speed eating？

A．It was caused by the new federal guidelines.

B．It makes students avoid feeling hungry.

C．It prevents students from feeling full.

D．It means less waiting time in the lunch line.

请帮忙给出正确答案和分析，谢谢！

宫颈癌发病的危险因素

A、未婚

B、早婚、多产

C、多次人流史

D、初产年龄大

E、长期使用避孕套者

请帮忙给出正确答案和分析，谢谢！

Which of the following is an idea held by Jonathan Portes？

A．Britain"s poor growth performance was due to fiscal austerity.

B．His findings are not suitable for the countries like the UK.

C．Most EU countries should raise their debt-to-GDP ratios.

D．EU countries should rely on fiscal austerity to avoid depression.

请帮忙给出正确答案和分析，谢谢！