口服刺激性药物可引起恶心、呕吐、胃肠功能不适等药物不良反应，是因为
A．胃肠道损害B．胃肠道反应C．低血糖D．耳毒性E．并发或加重
参考答案：C
连词成句。
1. on, like, chatting, my, with, friends, I, Internet, the
2. he, exercise, does, about, hour, half, day, a, an, for
3. are, table, the, juice, there, four, orange, on, cartons, of
4. should, a, week, watch, than, hours, TV, five, you, less
5. and, stay, right, exercise, healthy, doing, eating, food, you, help, can
热化发电率又称为电热比，是供热汽轮机的热化发电量与供热量之比。热化发电率 ( )，说明供同样的热量，在机组中转换成的电量越多，经济效益也越好。
A．越小 B．变化 C．越大 D．不变
