结核病联合化疗的主要目的是（）. A.减少合并症 B.避免发生耐药性，增加疗效 C.

It's easy to take your hearing for granted until it's too late.

With the wide    1   _(popular) of digital entertainment products, it is not uncommon to see people wearing headphones and listening to music    2    running in the park or using public transport. And the volume is often so loud that people around    3    can hear the music as well.

However, doctors warn that such behavior can    4   _(potential) damage their hearing. "In noisy places, people tend   5  _(turn) the volume up to get the same clarity of sound. Unfortunately, that can damage the hearing   6  people being aware of it," said Feng Yongfeng, chief ENT physician at Beijing Tian'an Hospital.

After Spring Festival, the hospital witnessed   7   slight increase in the number of teenagers coming in with hearing problems,  8   Feng attributed to them wearing headphones at home for long periods during the holiday. Feng said both in-ear and overhead headphones can harm the ears and    9   (advise) against using them for long periods. He said if you do use headphones it is worth    10   (invest) in the highest quality you can afford.

招标投标程序中在编制并发出招标文件与编制、送达、签收投标文件之间的有( )。

A．资格预审并确定合格的投标申请人

B．发出投标邀请书

C．答疑

D．确定招标人

E．踏勘现场

“奉天承运皇帝诏曰”从何时开始广泛应用的？（）

A、秦代

B、汉代

C、明代

直馏柴油加氢的目的是什么？

读相关材料，回答

材料一：图甲为地中海沿岸地质剖面图，图乙是图甲岩层局部放大图。

材料二：“地震真正的故事记录在岩石和土壤中。”地震是由地壳深处断层的运动引起的，如果运动足够强烈，地表就会产生裂缝，数年后，沉积物又将裂缝覆盖。

②④两处分别可能是哪两类岩石，判断依据是（）。。

A、花岗岩和石灰岩

B、玄武岩和大理岩

C、喷出岩和沉积岩

D、花岗岩和大理岩