缓释制剂与控释制剂的主要区别在于()
A. 缓释制剂为一级速度释放,而控释制剂的血药浓度“峰谷”波动较小
B. 缓释制剂为零级速度释放,而控释制剂的血药浓度“峰谷”波动较大
C. 缓释制剂的血药浓度“峰谷”波动更小
D. 控释制剂为恒速或接近恒速释放,而缓释制剂的血药浓度“峰谷”波动较小
E. 缓释与控释制剂均为恒速或接近恒速释放,但控释制剂的血药浓度“峰谷”波动大
一般滴眼剂的pH值应控制在()
A. 4~9
B. 5~9
C. 5~8
D. 4~8
E. 5~7.5
Which of the following words can be used to connect two clauses in a complex sentence?
A. So.
B. Therefore.
C. But.
D. Though.