第8题: [单项选择]关于用氢键形成来判断各类溶剂互溶规律,下列()项是正确的叙述。 A. 氢键形成是能量释放的过程,若溶剂混合后形成的氢键增加或强度更大,则有利于互溶 B. 氢键形成是能量吸收的过程,若溶剂混合后形成的氢键增加或强度更大,则有利于互溶 C. 氢键形成是能量释放的过程,若溶剂混合后形成的氢键增加或强度更大,则不利于互溶 D. 氢键形成是能量吸收的过程,若溶剂混合后形成的氢键增加或强度更大,则不利于互溶 参考答案:A
第12题: [单项选择]Why does the cost of living keep increasing A. Because are always shortages of goods. B. Because the workers are getting lower and lower pay. C. Because the government makes no interference. D. Because people demand more and better goods. 参考答案:D
A. consistently B. consequently C. invariably D. subsequently 参考答案:B 答案解析:consequently 结果、因此;consistently 一贯地;invariably 不变地、一定地、总是;subsequently 其后、随后、接着
第21题: [单项选择]呼吸功能异常易引起的错位是() A. 单侧后牙反 B. 后牙锁 C. 佝偻病 D. 下颌后缩畸形 E. 以上都是 参考答案:D